Connecting columnar member and method of installation thereof

Abstract

This invention provides a columnar member that uses an existing bottomed hole as a foundation and allows for the monitoring of changes over time using a relatively simple method. [Solution] A pair of columnar members, each having a tubular shape and a plate-shaped member with a through hole at one end, are arranged such that one end is inserted into a bottomed hole with the plate-shaped member attached. The through hole of the other columnar member aligns with the through hole of the first columnar member, forming a connecting hole. A bolt and nut, inserted as a connecting means along the connecting line, are used as the axis to rotate and erect the other columnar member, thus forming a connected columnar member. For rotation and erection, a method can be used to shorten the distance between the columnar members attached to each of the pair of columnar members by the action of a screw. As described above, the connected columnar member according to the present invention has a simple installation method and the connected pair of columnar members can be easily separated, so the internal changes over time can be checked at any time, thus preventing incidents such as unexpected collapse.

Description

Technical Field

[0001] The present invention relates to the structure of poles for installing street lamps and road signs and their installation methods. In particular, it relates to installable poles and their installation methods based on bottomed holes left as the underground part of existing poles that have collapsed, or bottomed holes formed by removing the poles.

Background Art

[0002] Generally, poles made of circular steel pipes buried in the ground are used for street lamps and road signs. With their aging, cases where poles collapse due to corrosion at the base have occurred. However, for reconstruction, it is necessary to rebuild the foundation part and block the road.

[0003] Also, due to their structure, it is difficult to grasp the degree of deterioration over time due to corrosion, especially the deterioration of the foundation part.

[0004] As a pole that can be installed relatively easily, Patent Document 1 discloses that a plurality of mounting holes A parallel to each other at equal intervals are provided from the upper end of a short base-fixed pole that stands vertically from the ground. On one end of a long upper pole, mounting holes B and C are provided at the same or an integral multiple of the intervals of the mounting holes A of the base pole. When building the pillar, a bolt or the like is inserted into one of the appropriate mounting holes A and B to create a rotatable hinge, and then the upper pole is rotated and erected around this hinge, and then the other mounting holes A and C are fixed with bolts or the like. However, the collapsible pole disclosed here is not intended for permanent use, so it is considered to have a problem with durability.

[0005] Furthermore, the present inventors disclose in Patent Document 2 a pole-shaped member joining device for joining another pole-shaped member to the base of a pole-shaped member buried underground, characterized in that it has a cylindrical body having a plurality of first through holes on its side surface, and a plurality of plate-shaped joining members integrally joined vertically to the side surface of the body and having at least one second through hole, wherein the plate-shaped joining members have a protruding portion that protrudes from one bottom surface of the body, and the center of the second through hole is positioned at or outside the bottom surface of one bottom surface of the body, and a method for joining pole-shaped members using the same. However, the method disclosed herein also uses members that have been buried underground in advance, so it is not necessarily sufficient from the viewpoint of rebuilding the foundation and understanding the degree of deterioration. [Prior art documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-226254 [Patent Document 2] Patent No. 6916979 [Overview of the project] [Problems that the invention aims to solve]

[0007] The present invention aims to provide a columnar member that can use an existing bottomed hole as a base in a relatively simple manner and that can monitor changes over time, in order to solve the aforementioned problems. [Means for solving the problem]

[0008] The present inventors have arrived at this invention as a result of diligently studying the application of the pole-shaped member joining method disclosed in Patent Document 2 to existing blind holes.

[0009] To solve the above problems, a connecting columnar member according to one aspect of the present invention has a pair of columnar members having a substantially circular and tubular cross-section, and a plurality of plate-like members are joined to the outer circumferential surface near one end face of each of the pair of columnar members at a position where they overlap when the respective end faces are facing each other, with a portion of each plate-like member protruding from the end face of the columnar member, and the center of each plate-like member being positioned outside the end face of the columnar member in a direction substantially normal to the outer circumferential surface, and the ends of the plurality of plate-like members that are not joined are planted in a bottomed hole drilled vertically in an existing foundation, and the other of the pair of columnar members is connected to one of the pair of columnar members with the sides to which the plate-like members are joined facing each other, and is fixed by joining means through the through hole of the plate-like member of one of the pair of columnar members and the plate-like member of the other of the pair of columnar members.

[0010] Furthermore, a method for installing a connecting columnar member according to one aspect of the present invention is characterized by inserting the side of one of the pair of columnar members that is not joined to the bottom hole into the bottom hole and planting it, inserting a connecting means into a communication through-hole formed by arranging the members so that one of the plurality of plate-shaped members joined to one of the pair of columnar members overlaps with one of the plurality of plate-shaped members joined to the other of the pair of columnar members, rotating the other of the pair of columnar members around the connecting means as an axis to position the two members so that the centers of one of the pair of columnar members and the other of the pair of columnar members substantially coincide, and then inserting the connecting means into each of the communication through-holes formed by the overlapping of the through-hole of the plurality of plate-shaped members joined to one of the pair of columnar members that is not joined with the through-hole of the plurality of plate-shaped members joined to the other of the pair of columnar members that is not joined with the connecting means, and fixing them in place.

[0011] Furthermore, a method for installing a connecting columnar member according to one aspect of the present invention involves attaching a pair of columnar member upright members to opposing portions of the outer circumference of the portion of the plate-shaped member through which the connecting members of the pair of columnar members are inserted, near the side of the plate-shaped member through which the longitudinal direction of the plate-shaped member is not joined, where the connecting members of the pair of columnar members are inserted. The upright members have an annular member at one end for gripping the columnar member and a tubular member at the other end that is rotatable in a plane parallel to the plane containing the central axis of the pair of columnar members. The rod-shaped material, having an outer diameter smaller than the inner diameter of one of the tubular members and a stopper at one end having an outer diameter larger than the inner diameter of the one tubular member, and having a male thread along substantially its entire length, is inserted into the one tubular member, the male thread is screwed into a female thread provided on the inner circumference of the other tubular member that engages with the male thread, the male thread is rotated in the direction that advances toward the opposite side of the stopper, and the columnar member on the side not planted in the bottomed hole is raised until the central axes of the pair of columnar members substantially coincide.

[0012] Furthermore, a method for installing a connecting columnar member according to one aspect of the present invention is characterized in that a plurality of spacer springs are attached to the inner circumference of the bottomed hole and to the outer circumference of one of the pair of columnar members inserted into the bottomed hole, for adjusting the distance between the outer circumference of one of the pair of columnar members and the inner circumference of the bottomed hole, and mortar is filled into the gap between the outer circumference of one of the pair of columnar members and the inner circumference of the bottomed hole. [Effects of the Invention]

[0013] The connecting columnar member according to the present invention has a configuration in which one of a pair of columnar members is planted in a bottomed hole formed by the collapse of an existing pole, and the other end of the pair of columnar members is joined via a plate-like member provided on the outer circumference of both columnar members. Compared to constructing a new foundation and erecting a single columnar member, the materials used are lighter, the work is simpler, and the joint can be separated, allowing the internal condition to be visually checked as needed. Therefore, it is possible to grasp the degree of deterioration due to changes over time, and unforeseen events such as collapse can be suppressed.

[0014] Furthermore, a key feature is that the aforementioned columnar member erection member can be used to raise and lower both ends of the pair of columnar members, eliminating the need for heavy machinery. Additionally, when inserting one of the columnar members into the bottomed hole, the distance between the outer circumference of the columnar member and the inner circumference of the bottomed hole can be easily adjusted by pre-attaching several spacer springs to the outer circumference of the columnar member. [Brief explanation of the drawing]

[0016] [Figure 1] A diagram showing one example of a pair of columnar members according to the present invention. [Figure 2] Figure 2(a) shows an example of a columnar member upright member 6 according to the present invention; Figure 2(a) is a plan view, Figure 2(b) is a front view, Figure 2(c) is a side view, and Figure 3(d) is a bottom view. [Figure 3] Figure 3(a) shows an example of a rod-shaped member according to the present invention; Figure 3(b) is a front view and Figure 3(b) is a top view. [Figure 4] A diagram showing an example of a method for installing a connecting columnar member according to the present invention. [Figure 5] Figure 5(a) is a front view and Figure 2(b) is a side view showing an example of a spacer spring according to the present invention. [Figure 6] This diagram shows an example of a columnar member with multiple spacer springs attached to its outer circumference, inserted into a bottomed hole. [Figure 7] This figure shows an example of the completed installation state of the connecting columnar member according to the present invention. [Modes for carrying out the invention]

[0016] Next, embodiments of the present invention will be described with reference to specific drawings.

[0017] Figure 1 shows an example of one of a pair of columnar members according to the present invention. The pair of columnar members according to the present invention differ in length, but the end configurations are almost identical, so each individual columnar member is simply referred to as a columnar member. In Figure 1, 1 is a columnar member, 2 is the body of the columnar member, 3 is a plate-like member, 4 is a through hole, and 5 is the end face of the columnar member.

[0018] As shown in FIG. 1, the columnar member body 2 has a tubular shape with a circular cross-section, and the plate-like member 3 is joined to the outer periphery of the columnar member body 2 by a method such as welding in a state where a part of it protrudes outside the end face 5 of the columnar member, that is, to the left side in the figure. In the example shown here, four plate-like members 3 are joined to the outer periphery of the columnar member body 2 at equal intervals. However, two or more are required to reliably connect a pair of columnar members.

[0019] Further, the plate-like member 3 is provided with a through-hole 4 whose center is arranged in a plane including the plane formed by the end face 5 of the columnar member. The position of the center of the through-hole 4 may be offset outside the end face 5 of the columnar member, that is, to the left side in the figure. Conversely, it will cause an obstacle to the connection of a pair of columnar members. When the position of the through-hole 4 is excessively offset to the left side in the figure, it can be dealt with by interposing a ring-shaped spacer between the end faces 5 of a pair of columnar members.

[0020] FIG. 2 is a diagram showing an example of the columnar member standing member 6 according to the present invention. FIG. 2(a) is a plan view, FIG. 2(b) is a front view, FIG. 2(c) is a side view, and FIG. 3(d) is a bottom view. The example shown here is formed in a ring shape by joining two divided pieces with joining means represented by bolts and nuts, and includes an annular member 7a capable of gripping the columnar member. A tubular member 8 is rotatably attached to the end of the extension part 7b joined to the annular member 7a on the side opposite to the annular member 7a in a direction parallel to the plane of the extension part 7b.

[0021] FIG. 3 is a diagram showing an example of the rod-shaped member 9 according to the present invention. FIG. 3(a) is a front view, and FIG. 4 FIG. 3(b) is a plan view. The columnar member standing member 6 shown in FIG. 2 is used by being attached to each of a pair of columnar members. The inner periphery of one tubular member is a through-hole with a smooth inner periphery so that the male screw part 10 of the rod-shaped member 9 can slide freely, and the inner periphery of the other tubular member is provided with a female screw that engages with the male screw provided on the rod-shaped member 9.

[0022] Furthermore, since the outer circumference of the stopper 11 is larger than the inner circumference of one of the tubular members, the distance between the two tubular members can be shortened by inserting the male threaded portion of the rod-shaped member 9 through one of the tubular members and screwing it into the female thread of the other tubular member, then gripping the rotary tool mounting portion 12 with a wrench or the like and rotating it.

[0023] Figure 4 shows an example of an installation method for the connecting columnar members according to the present invention. The unjoined side of one of the pair of columnar members 1b is inserted into a bottomed hole 14, and the other of the pair of columnar members 1a is positioned so that the joined plate-shaped members 3 overlap their respective through holes. A joining means 13, such as a bolt and nut, is inserted into the communication hole formed by the two through holes, and the other of the pair of columnar members 1a is connected in a state in which it can rotate around the joining means 13 as an axis.

[0024] As described above, for example, by inserting the side of the rod-shaped member 9 that has the rotating tool attachment portion 12 into the tubular member 8b, which has a through hole with a smooth inner circumference, from the lower left direction in the figure, and screwing the male threaded portion 10 into the female thread provided on the inner circumference of the tubular member 8a, and rotating the rod-shaped member 9, the distance between the annular members 8a and 8b is shortened, and the right end of the other 1a of the pair of columnar members rotates in the upper left direction in the figure.

[0025] Figure 5 shows an example of the spacer spring 15 according to the present invention, where Figure 5(a) is a front view and Figure 2(b) is a side view. The connecting columnar member according to the present invention uses a bottomed hole as the remaining part of a collapsed pole underground, or a bottomed hole after the remaining part has been removed, as a base. When inserting one of a pair of columnar members into the center of the bottomed hole, a spacer spring as shown in the figure is useful to adjust the distance between the inner circumference of the bottomed hole and the outer circumference of one of the columnar members.

[0026] Figure 6 shows an example of a columnar member with multiple spacer springs attached to its outer circumference, inserted into a bottomed hole. As shown here, by attaching at least three spacer springs to the outer circumference of the columnar member 1b, it is possible to position the columnar member 1b in the center of the bottomed hole.

[0027] Figure 7 shows an example of the completed installation of the connecting columnar member according to the present invention. As shown here, a mortar fall prevention material 18 is placed near the bottom of the bottomed hole of the existing foundation 16, and the connecting columnar member is fixed to the required position in the vertical direction using a height adjustment member 20. Then, mortar 17 is filled into the gap between the outer circumference of the connecting columnar member and the bottomed hole to fix it in place.

[0028] Furthermore, it is desirable to pour concrete around the base of the portion of the connecting columnar member that protrudes from the existing foundation for reinforcement. After this, the rod-shaped member b 9 and the two columnar member upright members 6a and 6b are removed, and the installation work is completed. After installation, the internal condition of the connecting columnar member can be easily checked by reversing the above steps, so that changes over time can be appropriately addressed.

[0029] As described above, the present invention provides a connecting columnar member and a method for installing it that can be installed using the remaining portion of a collapsed pole underground, and that allows for easy confirmation of the degree of deterioration over time. It should be noted that the present invention is not limited to the embodiments described above, and of course, design changes that do not depart from the spirit of the present invention, including various modifications and alterations that can be conceived by a person with ordinary skill in the art of the present invention, are also included in the present invention. [Explanation of Symbols]

[0030] 1, 1a, 1b... Columnar member 2... Columnar member body 3. Plate-shaped member 4. Through hole 5. End face of columnar member 6, 6a, 6b... Columnar members, upright members; 7a... Ring members 8, 8a, 8b... Tubular member 9... Rod-shaped member 10... Male threaded part 11. Stopper 12. Tool gripping section for rotation 13. Joining means 14. Bottomed hole 15. Spacer spring 16. Existing foundation 17. Mortar 18. Mortar fall prevention material 19. Root wrapping concrete

Claims

1. A connecting columnar member characterized by having a pair of columnar members having a substantially circular and tubular cross-section, and having a plurality of plate-like members joined to the outer circumferential surface near one end face of each of the pair of columnar members, with a portion of each plate-like member protruding from the end face of the columnar member, and the center of each plate-like member positioned outside the end face of the columnar member in a direction substantially normal to the outer circumferential surface, with each plate-like member joined to the outer circumferential surface at a position where they overlap when the end faces of each of the pair of columnar members are facing each other, and the ends of the plurality of plate-like members on the side where the plate-like member is joined are planted in a bottomed hole drilled vertically in an existing foundation, and the other of the pair of columnar members is connected to one of the pair of columnar members with the sides to which the plate-like member is joined facing each other, and is fixed by joining means through the through hole of the plate-like member of one of the pair of columnar members and the plate-like member of the other of the pair of columnar members.

2. A method for installing a connected columnar member according to claim 1, characterized in that: one side of the pair of columnar members that is not joined to the plate-shaped member is inserted into the bottomed hole and planted; a connecting means is inserted into a communication through-hole formed by arranging the plurality of plate-shaped members joined to one of the pair of columnar members so that one of the through-holes in the plurality of plate-shaped members joined to the other of the pair of columnar members overlaps; the other of the pair of columnar members is rotated around the connecting means as an axis so that the centers of one of the pair of columnar members and the other of the pair of columnar members substantially coincide; and the connecting means is inserted into each of the communication through-holes formed by aligning the through-hole of the plurality of plate-shaped members joined to one of the pair of columnar members that is not joined to the plate-shaped member that is not joined to the other of the pair of columnar members that is not joined to the plate-shaped member that is joined to one of the pair of columnar members and the connecting means is inserted into each of the communication through-holes formed by aligning the through-hole of the plurality of plate-shaped members joined to the other of the pair of columnar members that is not joined to the plate-shaped member that is joined to the other of the pair of columnar members and fixed in place.

3. A pair of columnar member uprighting members are attached to opposing portions of the outer circumference of the portion of the plate-shaped member through which the connecting members of the pair of columnar members are inserted, near the side of the plate-shaped member in the longitudinal direction that is not joined to the columnar member, where the plate-shaped member is joined to the columnar member through which the connecting members of the columnar member are inserted. The upright members have an annular member at one end for gripping the columnar member and a tubular member at the other end that is rotatable in a plane parallel to the plane containing the central axis of the pair of columnar members, and the outer diameter of one of the tubular members is smaller than the inner diameter of the other tubular member. A method for installing a connecting columnar member according to claim 2, characterized in that a rod-shaped material having a stopper at one end having an outer diameter larger than the inner diameter of the one tubular member and having a male thread along substantially its entire length is inserted into the one tubular member, the male thread is screwed into a female thread provided on the inner circumference of the other tubular member that engages with the male thread, the male thread is rotated in the direction toward the opposite side of the stopper, and the columnar member on the side not planted in the bottomed hole is raised until the central axes of the pair of columnar members substantially coincide.

4. A method for installing a connecting columnar member according to claim 3, characterized in that a plurality of spacer springs are attached to the inner circumference of the bottomed hole and to the outer circumference of one of the pair of columnar members inserted into the bottomed hole, for adjusting the distance between the outer circumference of one of the pair of columnar members and the inner circumference of the bottomed hole, and mortar is filled into the gap between the outer circumference of one of the pair of columnar members and the inner circumference of the bottomed hole.

Images