JP4686397B2 - Top cover structure of retractable fence post - Google Patents

Description

  The present invention relates to an externally provided fence column composed of an outer pipe buried in the ground and an inner pole housed in the outer pipe and raised to the ground as necessary. The present invention relates to a pipe top cover structure.

  The present applicant has developed and put into practical use a retractable fence post 1 having a structure as shown in FIGS. 3 to 5 (for example, Patent Documents 1 to 4). The basic structure of this kind of retractable fence column 1 is composed of an outer pipe 2 buried in the ground and an inner pole 3 that is detachably held in the outer pipe 2. Is fixed in a state of being pulled out to the ground, and the inner pole 3 is lowered into the outer pipe 2 and stored when not in use.

  FIG. 4 shows the structure of the upper lid portion of the outer pipe 2 provided on the ground surface. A flange member 4 is attached to the upper end of the outer pipe 2. The flange member 4 is a member in which a flange piece 42 projects in the circumferential direction from the upper edge of the short tube portion 41, and the short tube portion 41 is fitted on the outer peripheral surface of the outer pipe 2 and fixed by welding. A guide bush 5 made of a highly lubricating resin such as ABS resin is inserted from the upper end opening of the outer pipe 2 to the flange 42 of the flange member 4. The guide bush 5 has a cylindrical portion 51 and a flange portion 52, and the cylindrical portion 51 is inserted into the outer pipe 2 and comes into contact with the outer peripheral surface of the inner pole 3, thereby stabilizing the elevation of the inner pole 3. Reduce frictional resistance when moving up and down. The upper surface of the guide bush 5 is covered with an inverted dish-shaped guide cover 6 in which an inner pole insertion hole 61 is formed. The guide cover 6 is screwed to the flange member 4 together with the flange 52 of the guide bush 5 by screws 7 attached from above.

  An anchor pin 8 that protrudes outward is provided below the inner pole 3. The anchor pin 8 engages with a guide groove 53 formed on the inner surface of the guide bush 5 when the inner pole 3 is pulled up. As shown by broken lines in FIG. 4, the guide groove 53 includes a vertical groove 53 a penetrating the guide bush 5 in the vertical direction, a horizontal groove 53 b extending in the horizontal direction from the upper portion of the vertical groove 53 a directly below the guide cover 6, and And a drop groove 53c that descends again from the end of the lateral groove 53b. The lower part of the vertical groove 53a is widened so that the anchor pin 8 can be easily guided into the vertical groove 53a. When the inner pole 3 is pulled up, the anchor pin 8 guided in the longitudinal groove 53 a is prevented from coming off when it comes into contact with the guide cover 6. In this state, when the inner pole 3 is rotated several tens of degrees around the axis, the anchor pin 8 moves along the lateral groove 53b. When the anchor pin 8 is dropped into the drop groove 53c at the end of the lateral groove 53b, the pulled up inner pole 3 is held in a standing state.

Further, if the screw 7 is pulled out and the guide cover 6 is removed, the anchor pin 8 can be pulled out through the vertical groove 53a opened upward, so that the inner pole 3 can be removed.
Japanese Patent Laid-Open No. 10-82024 Japanese Patent Laid-Open No. 10-280346 JP-A-11-71729 Japanese Patent Laying-Open No. 2005-220618

  In the upper cover structure of the outer pipe as described above, in the unlikely event that the guide cover 6 or the guide bush 5 is damaged, for example, the inner pole 3 may be damaged due to a vehicle collision or the like, or the inner pole 3 may be raised or lowered. In such a case, the inner pole 3 must be detachably attached so that the inner pole 3 can be extracted and repaired or replaced. Therefore, conventionally, a screw 7 having a cross groove has been used as a fixing means for the upper lid structure.

  However, according to such a structure, the heads of the plurality of screws 7 are necessarily exposed on the upper surface of the guide cover 6 as shown in FIG. When the head of the screw 7 is exposed to the ground surface exposed to rainwater and dirt, dirt and dirt are clogged up in the gaps between the irregularities, and the aesthetics are impaired. There is also a risk of causing obstacles on the walking surface. In recent years, barrier-free in public spaces has been demanded in fine detail on various surfaces. Therefore, it is desired that the surface of this kind of article be finished as flat as possible without any unevenness.

  The present invention has been made in view of such circumstances, so that the upper surface of the upper lid is finished as flat as possible so that the head of the screw is not exposed on the upper surface of the upper lid portion that appears on the ground surface, and the upper lid portion is also attached and detached as necessary. The upper cover structure of the retractable fence pillar comprised so that it could do is provided.

  In order to achieve the above-described object, the upper cover structure of the retractable fence post according to the present invention has a guide bush having a cylindrical portion and a collar portion inserted in an upper end opening of an outer pipe buried in the ground. The flange part of the bush is screw-fixed to the flange member attached to the outer periphery of the upper end of the outer pipe, and an inverted dish-shaped guide cover provided with an inner pole insertion hole is put on the guide bush. The guide cover is fitted into the guide bush by the engagement claw projecting on the inner surface of the member being elastically engaged with the engagement recess formed on the outer peripheral surface of the guide bush.

  Further, in the upper cover structure of the retractable fence post according to the present invention, a guide groove for guiding an anchor pin protruding from the inner pole is provided on the inner surface of the cylindrical portion of the guide bush, and the guide groove opens downward. A vertical groove that stops near the top of the guide bush, a horizontal groove that extends laterally from the upper end of the vertical groove, a falling groove that descends from the extension destination of the horizontal groove, and an opposite direction of the horizontal groove from a position slightly lower than the upper end of the vertical groove And an extraction groove that extends upward from the extension of the escape groove and opens upward.

  Further, the upper lid structure of the retractable fence post according to the present invention has a substantially dish-shaped guide ring with a collar raised at the periphery on the outside of the flange member, and the periphery of the guide cover inside the collar Is installed, and the upper end of the collar and the top surface of the guide cover are installed so as to be flush with the ground surface.

  The upper lid structure of the present invention of the retractable fence column configured as described above employs a configuration in which the guide bush is fixed to the flange member by screws and the guide cover is fitted on the upper surface thereof. The upper surface can be finished flat without exposing any screws. Therefore, the design property is improved and it is difficult to be tampered with.

  When the inner pole is extracted, the anchor cover protruding from the inner pole is pulled up through the extraction groove formed in the guide bush, so that the guide cover can be hooked and removed from the anchor pin.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The overall configuration of the retractable fence post 10 according to the present invention is the same as that of the conventional retractable fence post 1 shown in FIG.

  FIG.1 and FIG.2 shows the upper cover structure of the outer pipe 2 concerning one Embodiment of this invention. The flange member 4 attached to the upper end of the outer pipe 2 is not particularly different from the flange member 4 according to the conventional upper lid structure shown in FIG. 4, and the flange piece 42 extends in the circumferential direction from the upper edge of the short cylindrical portion 41. It has a shape. The short cylindrical portion 41 of the flange member 4 is fitted on the outer peripheral surface of the outer pipe 2 and fixed by welding.

  The guide bush 50 made of a highly lubricious resin has a cylindrical portion 51 and a flange portion 52 as in the conventional guide bush 5 shown in FIG. 4, and the cylindrical portion 51 is inserted into the upper end opening of the outer pipe 2. Thus, the flange 52 is overlaid on the flange 42 of the flange member 4. A plurality of screw holes 54 are provided in the flange portion 52 of the guide bush 50, and a female screw hole 43 matching the screw hole 54 is tapped on the flange piece 42 of the flange member 4 and screwed from above. The guide bush 50 is fixed to the flange member 4 with screws 7.

  The upper surface of the guide bush 50 is covered with an inverted dish-shaped guide cover 60 in which an inner pole insertion hole 61 is formed. Unlike the conventional case, the guide cover 60 has a flat top surface with no screw holes. Then, the plurality of engaging claws 62 projecting from the inner surface of the peripheral edge of the guide cover 60 are elastically engaged with the plurality of engaging recesses 55 formed on the outer peripheral surface of the guide bush 50. The guide bush 50 is fitted. Thus, by attaching the guide cover 60 without exposing the screw 7 on the upper surface, it is possible to improve the design and to prevent the tampering with the screw 7. Note that the shapes of the engaging claw 62 formed on the guide cover 60 and the engaging recess 55 engaged with the guide bush 50 are not limited to the illustrated form, and both are suitably engaged with appropriate elasticity. Anything that matches.

  As described above, if the guide cover 60 having a flat top surface is put on the guide bush 50 in a so-called fitted-in state, it is difficult to remove the guide cover 60 when the inner pole 3 is repaired or replaced. . Therefore, in the present invention, the guide groove 53 formed on the inner surface of the guide bush 50 is improved so that the guide cover 60 can be attached and detached.

  As shown in FIG. 1, the guide groove 53 includes a vertical groove 53a that opens downward and stops near the upper portion of the guide bush 50, a horizontal groove 53b that extends laterally from the upper end of the vertical groove 53a, and an extension destination of the horizontal groove 53b. A drop groove 53c that descends, an escape groove 53d that extends in a direction opposite to the lateral groove 53b from a position slightly lower than the upper end of the vertical groove 53a, and a removal groove 53e that extends upward from the extension of the escape groove 53d and opens upward. And have. The lower part of the vertical groove 53a is opened downward to widen the anchor pin 8 protruding from the inner pole 3 so that it can be easily guided into the vertical groove 53a. The guide groove 53 is formed so as to be opposed to two places on the inner surface of the cylindrical portion 51.

  In the normal raising / lowering operation, the inner pole 3 is pulled up to prevent the anchor pin 8 guided in the vertical groove 53a from coming into contact with the upper end of the vertical groove 53a. In this state, the inner pole 3 is rotated clockwise. Then, the anchor pin 8 moves along the horizontal groove 53b, and the anchor pin 8 falls into the drop groove 53c at the end of the horizontal groove 53b, whereby the inner pole 3 is held in an upright state. This guide structure is the same as the conventional one. However, in order to prevent the anchor pin 8 from coming into contact with the back surface of the guide cover 60 when the inner pole 3 is pulled up, the vertical groove 53a is a dead end so as not to open above the guide bush 50.

  When storing the inner pole 3 in the standing state, the inner pole 3 is lifted and rotated counterclockwise. Then, the anchor pin 8 is guided along the horizontal groove 53b from the upper end of the drop groove 53c, enters the vertical groove 53a at the end thereof, and can be lowered along the vertical groove 53a.

  When it is desired to pull out the inner pole 3, the inner pole 3 is pulled up and slightly lowered from the state where the anchor pin 8 is in contact with the upper end of the vertical groove 53a, and the inner pole 3 is rotated counterclockwise. Then, the anchor pin 8 is guided to the extraction groove 53e via the escape groove 53d. When the inner pole 3 is pulled straight up from the end of the escape groove 53d, the anchor pin 8 passes through the extraction groove 53e and is caught on the back surface of the guide cover 60, and the guide cover 60 is lifted and separated from the guide bush 50. In this way, the inner pole 3 can be extracted by an operation that is simple but difficult for an outsider to understand.

  In the above-described extraction operation, the guide cover 60 fitted to the guide bush 50 is removed by so-called forcible extraction, so that the engagement claw 62 formed on the guide cover 60 or the engagement with the guide bush 50 is engaged. There is a possibility that any of the joint recesses 55 may be deformed or damaged. In that case, replace the parts with new ones and re-install them.

  Furthermore, in the top cover structure of the retractable fence post according to the present invention, in order to eliminate the level difference from the ground surface GL and install it flatly, a space for attaching a substantially dish-shaped guide ring 9 to the outside of the flange member 4 is adopted. Yes. The guide ring 9 has a ring-shaped base ring part 91 and a collar part 92 raised at the periphery thereof, and the base ring part 91 is welded to the flange 42 of the flange member 4 from below. It is integrated with the flange member 4. The inner diameter of the collar portion 92 is larger than the outer diameter of the guide cover 60 by a minute dimension, and the rising height of the collar portion 92 is formed to be approximately the same as the height of the peripheral edge portion of the guide cover 60. . The outer pipe 2 is embedded in the ground so that the upper end of the collar portion 92 is flush with the ground surface GL.

  By attaching the guide bush 50 and the guide cover 60 to the flange member 4 thus positioned, the upper end of the collar portion 92 and the top surface of the guide cover 60 are finished flush with the ground surface GL. Employing such accommodation improves the workability when finishing the space between the outer pipe 4 buried in the ground and the ground surface GL, and prevents dirt and dust from entering around the guide bush 50 and the guide cover 60. It becomes easier to prevent and maintain. Further, it is possible to prevent the ground surface GL at the peripheral edge from being damaged or broken when the guide cover 60 is attached or detached. The guide ring 9 may be formed integrally with the flange member 4 in advance.

It is a half section view and a half side view of the upper lid structure of the retractable fence post according to the embodiment of the present invention. It is a disassembled perspective view of the said upper cover structure. It is a side view which shows the basic structure of the retractable fence pillar. It is a half sectional view and half side view of an upper lid structure concerning the conventional composition. It is a top view of the upper cover structure concerning the conventional structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Retractable fence pillar 2 Outer pipe 3 Inner pole 51 Cylindrical part 52 Girder part 50 Guide bush 4 Flange member 61 Inner pole insertion hole 60 Guide cover 62 Engagement claw 55 Anchor pin 53 Guide groove 53a Vertical groove 53b Horizontal groove 53c Drop groove 53d Relief groove 53e Extraction groove 9 Guide ring 92 Collar GL Ground surface

Claims (3)

  A guide bush having a cylindrical portion and a flange portion is inserted into the upper end opening of the outer pipe buried in the ground, and the flange portion of the guide bush is attached to the flange member attached to the outer periphery of the upper end of the outer pipe. An inverted dish-shaped guide cover fixed with a screw and provided with an inner pole insertion hole is placed on the guide bush, and an engaging claw protruding from the inner surface of the peripheral portion of the guide cover is formed on the outer peripheral surface of the guide bush. An upper cover structure of a retractable fence column, wherein the guide cover is fitted into the guide bush by elastically engaging with the engaging recess.   A guide groove for guiding the anchor pin projecting from the inner pole is provided on the inner surface of the cylindrical portion of the guide bush. The guide groove has a vertical groove that opens downward and stops near the upper portion of the guide bush. A lateral groove extending laterally from the upper end of the groove, a drop groove descending from the extension destination of the lateral groove, a relief groove extending in a direction opposite to the lateral groove from a position slightly lower than the upper end of the longitudinal groove, and upward from the extension destination of the escape groove The upper cover structure of the retractable fence column according to claim 1, further comprising a extraction groove extending upward and opening upward.   A substantially dish-shaped guide ring with a collar raised at the periphery is attached to the outside of the flange member, and the periphery of the guide cover is inserted inside the collar, and the upper end of the collar The upper cover structure of the retractable fence column according to claim 1 or 2, wherein the top surface of the guide cover is installed so as to be flush with the ground surface.

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