JP2007231621A - Telescopic fence pole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescopic fence pole which allows the operator to easily handle the same in a standing comfortable position during ascending/descending operation or locking operation of a pole body. <P>SOLUTION: The telescopic fence pole 1 is formed of an external cylinder 2, the pole body 3 stored in the external cylinder 2, and a coiled constant force spring 7 arranged in a lower portion of the pole body 3 with its rotating axis laid in the horizontal direction, whereby the pile body 3 is energized in an ascending direction by winding-up force of the spring. The fence pole is formed of an operation rod 8 arranged outside the external cylinder 2, which operation rod has engaging projections 9 formed thereon at suitable locations inclusive of locations near a lower end and an upper end, for inhibiting the pole body 3 from moving up and down, and therefore the engaging projections 9 are engaged with window openings 10 formed in the external cylinder 2 to protrude inside the external cylinder 2. On the other hand, the pole body 3 has a stop cam 11 arranged on a lower portion thereof, for engaging with the engaging projections 9 at a predetermined vertical height, and therefore, when the operation rod 8 is axially rotated from above the external cylinder 2, engagement between the engaging projection 9 and the stop cam 11 is disengaged, to thereby allow the pole body 3 to move up and down. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a retractable fence column that is housed in an outer cylinder buried in the ground and is configured to be restricted by being pulled up to the ground and standing up as necessary.

  With respect to this type of retractable fence column, in order to facilitate the lifting and lowering operation of the column body, a technique for applying an upward biasing force to the column body using a constant load spring has been proposed (for example, Patent Documents). 1-3). According to these techniques, even a heavy column can be pulled up with a light force or can be automatically raised, and the column can be prevented from suddenly dropping during storage.

Furthermore, in Patent Documents 2 and 3, as means for locking the column body in a state of being accommodated in the outer cylinder, a latch is provided on either the outer cylinder or the column body, and either one can be engaged with the latch. A configuration in which an engagement recess is provided is described.
No. 7-20167 Japanese Utility Model Publication No. 6-12517 Japanese Utility Model Publication No. 6-12518

  According to the technique described in the above document, the column body can be automatically raised by setting the balance constant force of the constant load spring larger than the weight of the column body, so even if the weight of the column body is large, The raising operation becomes easy. However, when the column is stored and locked in the ground, the operator must bend down to unlock the column or push down the locked column into the ground to lock it. There is a need to do.

  This kind of haunting fence column is rarely used alone, and many are often used simultaneously in parking lots such as public facilities and shopping centers. Furthermore, considering the fact that many of the workers who manage and operate the haunting fence pillars at the facilities described above are elderly people, when they raise or lower a large number of pillars, What must be done is a great physical burden for the operator.

  Patent Documents 2 and 3 describe that an operating portion for pulling the latch is provided on the upper end surface of the outer cylinder or the column, but the detailed structure and operating method are unknown. Therefore, the request | requirement of reducing the burden of the operator in lock operation and lock release operation is not responded.

  The present invention has been made to solve such a problem, and when the column body is raised and lowered and locked, the operator can easily operate in an easy posture while standing without any action. The problem to be solved is to provide a fence post and reduce the burden on the operator.

  In order to achieve the above-described object, the retractable fence column of the present invention includes an outer cylinder embedded in the ground and a column body that is housed up and down in the outer cylinder, and a coiled constant load spring is provided. The rotating shaft is mounted horizontally and attached to the lower part of the column body, the tip of the constant load spring is connected to the upper part of the outer cylinder, and the column body is urged in the upward direction by the hoisting force of the constant load spring. In the retractable fence column configured as described above, an operation rod extending in the vertical direction is arranged on the outer side of the outer cylinder, and the lifting and lowering of the column body is restrained at appropriate places including the vicinity of the lower end portion and the upper end portion of the operation rod. The engaging projection is arranged so as to protrude into the outer cylinder through a window-like opening formed on the outer peripheral surface of the outer cylinder, while the lower part of the column body has a predetermined elevation A stop cam that engages the engagement protrusion at a position is provided, and the operation rod is connected to the outer cylinder. By rotating around the axis from the direction, the engaging projections and the engaging is released pillar between the stop cam is characterized by comprising a vertically movable.

  In the retractable fence column adopting this configuration, the column body is restrained from being raised and lowered by the engagement between the engagement protrusion provided on the operation rod and the stop cam provided at the lower portion of the column body. Then, when the operation rod is rotated from above with an appropriate rod-like operation tool or the like, the columnar body in the stored state is released from the restraint, and is automatically raised by the hoisting force of the constant load spring. The column body in the can be stored by being pushed down by a hand or a foot. When the operating rod is returned to the original position when the column body is moved up and down to a desired position, the engagement protrusion and the stop cam are engaged again, and the column body is restrained from moving up and down.

  The stop cam has a first engagement claw and a second engagement claw that are arranged to face each other vertically, and the upper first engagement claw is an engagement protrusion when the column body is raised. When the column body descends, it protrudes outward and is urged to engage with the engagement projection, while the second engagement claw is Can be brought into contact with the engaging protrusion and immerse inward, and when the column body is raised, it can be biased to protrude outward and engage with the engaging protrusion.

  According to this configuration, if the operating rod is rotated to release the engagement state between the engaging protrusion and the stop cam, the operating rod is returned to the original position before the column body is raised or lowered to the desired position. Even if it returns, the stop cam automatically engages with the engaging projection at that position, and the column stops. Therefore, it is not necessary to rotate the operating rod in accordance with the raising / lowering timing of the column body, and the rotating operation of the operating rod is simplified.

  If the operating rod is urged so as to return to the position where the engaging projection faces the window-like opening of the outer cylinder by the elastic force of the spring member inserted around its axis, the rotating operation is further performed. It becomes easy and usability improves.

  An operating pin is connected to the upper end of the operating rod via an operating pin connecting pipe with a spring member built in. The operating pin is provided so that it can be pushed into the operating rod from above, and the operating pin is pressed. If a lock means that allows the operation rod to rotate only when it is inserted is provided, it is possible to prevent the column body from being raised or lowered inadvertently due to an unexpected impact or the like.

  According to the retractable fence column of the present invention configured as described above, the column body is moved up and down by rotating the operation rod using an appropriate rod-shaped operation tool from above the outer cylinder, and at a desired position. Since it can be restrained, the operator does not have to bend down or squat down every time the column body is raised or lowered. Therefore, the physical burden of the worker is greatly reduced and the management work of the fence pillar is speeded up even in the use site where an elderly worker has to move up and down many fence pillars continuously. be able to.

  Hereinafter, the structure of the retractable fence pillar which concerns on embodiment of this invention is demonstrated, referring drawings. FIG. 1 is a schematic view showing the overall configuration of a retractable fence column 1, in which a substantially upper half portion of the outer cylinder 2 is represented as a longitudinal section, and a column body 3 housed in the outer cylinder 2 is a front view. Represents.

  The outer cylinder 2 embedded in the ground has a hollow cylindrical shape, and the lower end is closed by the outer cylinder bottom plate 4. A lid-like upper structure projecting outward is provided at the upper end of the outer cylinder 2, and the column 3 is inserted inside the upper structure.

  The column 3 has a hollow cylindrical shape that is thinner than the outer cylinder 2, and the length thereof is substantially the same as that of the outer cylinder 2. A light emitting unit 5 is provided in the vicinity of the upper portion of the illustrated column body 3. The column body 3 is held in a state where the bottom portion is supported by the column body support device 6 having a diameter slightly larger than the outer diameter of the column body 3.

  A constant load spring 7 wound in a coil shape is attached to the column body support device 6 with its rotation axis turned sideways. The tip of the constant load spring 7 extends upward between the column 3 and the outer cylinder 2 and is connected to the upper part of the outer cylinder 2 to pull up the column support device 6 in the upward direction. The balance constant force of the constant load spring 7 is set to be slightly larger than the combined weight of the column body 3 and the column body support device 6. For this reason, in a state where the external force that restrains the column body 3 does not act, the column body support device 6 is urged in the upward direction by the hoisting force of the constant load spring 7, and thereby the column body 3 rises.

  An operating rod 8 extending in the vertical direction is attached to the outside of the outer cylinder 2 so as to be able to rotate around the axis. Engaging protrusions 9 for restraining the lifting and lowering of the column 3 are provided at appropriate positions in the vicinity of the lower end portion, the upper end portion, and the intermediate portion of the operation rod 8. Each engagement protrusion 9 protrudes inward of the outer cylinder 2 through a window-like opening 10 formed on the peripheral surface of the outer cylinder 2.

  On the other hand, the columnar support device 6 is provided with a stop cam 11 that faces and engages with the engagement protrusions 9. Then, when the operating rod 8 is rotated about the axis from the upper side of the outer cylinder 2, the engagement between the engagement projection 9 and the stop cam 11 is released, and the column 3 can be moved up and down. Engaging with the stop cam 11 restrains the lifting and lowering of the column 3.

  2 and 3 show the upper structure of the outer cylinder 2. A flange 14 having a short cylinder part 12 and a flange part 13 is attached to the upper end part of the outer cylinder 2. The short cylinder portion 12 is fitted and fixed to the outside of the outer cylinder 2, and the flange portion 13 projects outward from the outer cylinder 2. An opening 15 for rotating the operation rod 8 and a spring fixing hole 16 tapped with a female screw are formed in the flange portion 13. A fixing tool 17 having a substantially L-shaped cross section attached to the tip of the constant load spring 7 is screwed into the spring fixing hole 16 from above the collar portion 13.

  An adjustment plate 18 is overlaid on the upper side of the flange 13 of the flange 14. The adjusting plate 18 is a flat plate material that forms an annular shape having substantially the same diameter as the flange portion 13 of the flange 14. The adjustment plate 18 is formed with a key hole 19 for operating the operation rod 8 and a notch 20 for accommodating the fixture 17 of the constant load spring 7.

  A synthetic resin bush 21 is overlaid on the adjustment plate 18. The bush 21 has a cylindrical portion 22 and a flange portion 23. The cylindrical portion 22 is formed so that its outer diameter is slightly smaller than the inner diameter of the outer cylinder 2 and its inner diameter is slightly larger than the outer diameter of the column 3. The outer diameter of the bowl-shaped portion 23 is slightly smaller than the outer diameter of the adjustment plate 18. Then, the tube portion 22 is inserted into the outer tube 2, and the hook-shaped portion 23 is overlaid on the adjustment plate 18. Here, in order to avoid the interference between the cylindrical portion 22 and the fixture 17 of the constant load spring 7, a part of the outer side of the cylindrical portion 22 is cut into a thin shape as shown in FIG.

  A circular operation pin holding hole 24 is formed in the bowl-shaped portion 23 of the bush 21, and the operation pin 25 is accommodated in the operation pin holding hole 24. The operation pin 25 is a member having a substantially T-shaped cross section having a large-diameter head portion 26 and a thin-diameter shaft portion 27. The head 26 is formed with a slit 29 for engaging an appropriate operation tool 28. A locking piece 30 is formed on the shaft portion 27 so as to be laterally extended from the head portion 26. The shaft portion 27 is inserted into the key-shaped hole 19 of the adjustment plate 18, and the locking piece 30 of the shaft portion 27 is engaged with the lock groove 31 formed in the key-shaped hole 19. Is locked.

  A lid cover 32 is overlaid on the upper side of the bush 21. The lid cover 32 is an inverted dish-like member with the side edge 33 hanging down, and is attached so that the side edge 33 surrounds the outer periphery of the bush 21. A circular operation hole 34 is formed in the top surface portion of the lid cover 32, and a short circular tubular operation pin guide ring 35 is attached to the lower side thereof. The operation pin guide ring 35 is inserted into the operation pin holding hole 24 of the bush 21 and holds the head 26 of the operation pin 25 in a rotatable manner inside the operation pin guide hole 35. The diameter of the operation hole 34 is formed to be slightly smaller than the diameter of the head 26 of the operation pin 25, thereby restricting the operation pin 25 from coming out upward.

  A plurality of screw holes 36, 37, and 38 that match when the adjustment plate 18, the flange-like portion 23 of the bush 21, and the top surface portion of the lid cover 32 are overlapped are formed. Then, the connecting screws 39 inserted into these screw holes 36, 37, 38 are screwed into a plurality of connecting female screw holes 40 formed by tapping the flange 13 of the flange 14, and the adjusting plate 18, the bush 21, and the lid cover 32 are connected to the flange 14.

  The operation pin 25 held between the adjustment plate 18 and the lid cover 32 by such an upper structure is connected to the operation rod 8 via the operation pin connection pipe 41. The operation pin connection pipe 41 is a hollow cylindrical member, and a lower end thereof is inserted into a connection protrusion 42 formed by cutting the upper end of the operation rod 8. The operation pin coupling pipe 41 and the operation rod 8 are coupled so as not to rotate with each other by welding the insertion portion or driving the fixing pin 43 from the side. A vertically long locking groove 44 is formed at the upper end of the operation pin connecting pipe 41, and the shaft portion 27 of the operation pin 25 is connected to the operation pin in a state where the locking piece 30 is engaged with the locking groove 44. Inserted into the pipe 41.

  A compression coil spring 45 is built in the operation pin connecting pipe 41, and this compression coil spring 45 urges the operation pin 25 to always push upward. When the operation pin 25 is pushed up, the locking piece 30 protruding to the side of the shaft portion 27 engages with the lock groove 31 formed in the key-shaped hole 19 of the adjustment plate 18, and The rotation is locked. However, when the operating pin 25 is pushed down from above, the locking piece 30 is pulled out to the lower side of the adjustment plate 18, the engagement between the locking piece 30 and the lock groove 31 is released, and the operating pin 25 can be rotated. . By such a locking means, the operation rod 8 can be rotated only when the operation pin 25 is pushed in from above.

  A stopper piece (not shown) is provided below the lock groove 31 so that the operation pin 25 can rotate only in one direction. For this reason, even when the operation pin 25 is pushed in, the locking piece 30 comes into contact with the stopper piece so that the operation pin 25 does not rotate in the reverse direction.

  A torsion coil spring 46 is inserted into the operation rod 8. One end of the torsion coil spring 46 is hooked on the engaging projection 9 protruding from the operation rod 8, and the other end is extended in the lateral direction and hooked on the outer peripheral surface of the outer cylinder 2. The torsion coil spring 46 gives a biasing force that returns the operating rod 8 to its original position when the operating rod 8 rotates about its axis.

  An operation rod cover 47 having a substantially U-shaped cross section is attached to the side of the operation rod 8. The operation rod cover 47 is fixed by welding both side edges to the outer peripheral surface of the outer cylinder 2.

  4 to 7 show the lower structure of the column 3.

  The columnar support device 6 that supports the columnar body 3 has an outer shape constituted by a substantially H-shaped wall member in top view, and an upper bottom plate 51 and a lower bottom plate 52 coupled to the upper and lower surfaces, respectively. The wall member includes a pair of left and right side wall portions 53, 53 and an intermediate wall portion 54 that connects the side wall portions 53, 53. The constant load spring 7 is disposed between the side wall portions 53 and 53, and the rotary shaft member 55 is inserted into the bearing holes formed in the side wall portions 53 and 53. Snap pins 56 are attached to both ends of the rotary shaft member 55 to prevent it from coming off.

  The upper bottom plate 51 and the lower bottom plate 52 are substantially circular plate materials, and their outer diameters are formed slightly smaller than the inner diameter of the outer cylinder 2. A cutout portion 57 for avoiding interference with the engaging protrusion 9 of the operating rod 8 and a cutout portion 58 for draining water are formed at the edge portions of the upper bottom plate 51 and the lower bottom plate 52, respectively. Furthermore, a notch 59 for avoiding interference with the constant load spring 7 is also formed at the edge of the upper bottom plate 51.

  A plurality of column body support pins 61 are provided upright on the upper surface of the upper bottom plate 51. The column body support pins 61 are arranged so as to match the inner diameter of the column body 3, and the column bodies 3 are detachably attached so that the lower end openings of the column bodies 3 are fitted to these column body support pins 61. .

  The stop cam 11 is provided on the opposite side of the constant load spring 7 with the middle wall portion 54 interposed therebetween so as to face the operation rod 8. The stop cam 11 includes a pair of upper and lower claw members 62 and 63. Both the upper and lower claw members 62 and 63 have horizontal rotation shafts, and these rotation shafts are pivotally supported by a pair of inner wall portions 64 and 64 projecting from the middle wall portion 54 toward the operation rod 8. ing.

  The upper claw member 62 has a shape in which a first engagement claw 66 extends laterally and a first tongue piece 67 extends downward from an arm portion 65 that holds the rotation shaft. An intermediate portion of the arm portion 65 is cut out, and a torsion spring 68 is inserted around the rotation axis. One end of the torsion spring 68 abuts against the middle wall portion 54 to urge the upper claw member 62 in the protruding direction of the first engagement claw 66 (clockwise direction in FIG. 7). The biased upper claw member 62 abuts on an upper stopper plate 69 provided between the inner wall portions 64, 64, and further rotation is restricted. When the first engagement claw 66 is in a protruding state, the first engagement claw 66 is formed so that the upper surface is obliquely downward toward the tip and the lower surface is substantially horizontal. The first tongue piece 67 is formed so as to face downward when the first engagement claw 66 protrudes.

  The lower claw member 63 has a shape in which a second engagement claw 71 extends laterally and a second tongue piece 72 extends downward from an arm portion 70 that holds the rotation shaft. An intermediate portion of the arm portion 70 is cut out, and a torsion spring 73 is inserted around the rotation axis. One end of this torsion spring abuts against the middle wall portion 54 to urge the lower claw member 63 in the protruding direction of the second engagement claw 71 (counterclockwise direction in FIG. 7). The biased lower claw member 63 abuts on a lower stopper plate 74 provided between the inner wall portions 64 and 64, and further rotation is restricted. When in the projecting state, the second engaging claw 71 is formed such that the upper surface is substantially horizontal and the lower surface is obliquely upward toward the tip. The second tongue piece 72 is formed so as to face upward in the protruding state of the second engagement claw 71 and to overlap the back side of the first tongue piece 67.

  The stop cam 11 configured in this way operates as follows when the column 3 is raised and lowered.

  7 shows a state where the stop cam 11 is engaged with the engaging protrusion 9 of the operating rod 8 protruding into the outer cylinder 2 through the window-like opening 10 and the raising / lowering of the column 3 is restrained. In this state, the column 3 is going to be pulled upward by the winding force of the constant load spring 7, but the column 3 cannot be raised because the second engagement claw 71 is caught by the engagement protrusion 9 from below. Further, if the column body 3 is pushed down from this state, the first engagement claw 66 is caught by the engagement projection 9, so that the column body 3 cannot be lowered. In the state in which the column body 3 is completely stored to the lowest position and the state in which the column body 3 is pulled out to the intermediate position or the uppermost position, the column body 3 is restrained in the state of this lower stage. It becomes.

  When the operating rod 8 is rotated in this state, the engagement between the engagement protrusion 9 and the stop cam 11 is released. When the column 3 is in the storage position or the intermediate position, the column 3 is raised by the biasing force of the constant load spring 7. Then, as shown in the upper diagram of FIG. 7, the stop cam 11 comes into contact with the upper engaging projection 9 from below. Then, first the first engaging claw 66 is brought into contact with the engaging protrusion 9 and is sunk inside, and at the same time, the first tongue piece 67 pushes the second tongue piece 72, so that the second engaging claw 71 is also temporarily suspended. Immerse inside. However, at the moment when the first engagement claw 66 gets over the engagement projection 9, the first engagement claw 66 and the second engagement claw 71 return to the protruding state, and the engagement projection 9 is moved to the engagement projection 9 as shown in the lower diagram. Engage.

  On the other hand, when the operation rod 8 is rotated in a state where the column body 3 is at the intermediate position or the uppermost position and the column body 3 is pushed down from there, as shown in the middle diagram of FIG. Thus, the stop cam 11 contacts from above. Then, the second engagement claw 71 comes into contact with the engagement protrusion 9 and is immersed inside. However, since the second tongue piece 72 does not push the first tongue piece 67 at this time, the first engagement claw 66 remains in the protruding state and abuts against the engagement protrusion 9 to stop the column body 3 from being pushed down. And if the 2nd engagement claw 71 also gets over the engagement protrusion 9, it will return to a protrusion state, will return to the state of a lower stage figure, and the column 3 will be restrained.

  As described above, according to the present invention, the column body 3 can be moved up and down only by temporarily rotating the operation rod 8, and the column body 3 is moved by the urging force or artificially pushing down force of the constant load spring 7. When it moves up and down, the stop cam 11 is again engaged with another engaging projection 9 provided at the upper or lower position, and the lifting and lowering of the column 3 is automatically restrained. The turning operation of the operating rod 8 may be a simple operation in which the rod-like operating tool 28 is engaged with the head 26 of the operating pin 25 connected to the upper portion and the operating pin 25 is rotated while being pushed down. Therefore, it can be easily performed while standing, and the management work of the column 3 is facilitated.

  In the illustrated embodiment, a retaining bar 77 is attached near the lower portion of the column 3. The retaining bar 77 penetrates the column 3 in the horizontal direction, and both ends protrude from the outer peripheral surface of the column 3. The retaining bar 77 passes through a guide groove 78 (see FIGS. 2 and 3) formed on the inner peripheral surface of the cylindrical portion 22 of the bush 21 when the column body 3 is raised, and is behind the lid cover 32. By abutting on, it serves to prevent the column 3 from slipping out. When repair or inspection is necessary, the column body 3 can be extracted by removing the lid cover 32.

  Further, the guide groove 78 has a branching portion 79 which is lowered by one step after extending from the upper side to the side. When the column 3 in the raised state is slightly lifted and rotated around the axis, and both ends of the retaining bar 77 are dropped into the branch 79, the column 3 is held in a state of being lifted from the column support device 6. The When the column body 3 is kept elevated for a long period of time, it is possible to prevent the elastic deterioration of the constant load spring 7 by reducing the weight acting on the constant load spring 7 by such a method. It is.

  It should be noted that the present invention is not limited to the above-described embodiment, and can of course be implemented by appropriately modifying the shape and structure of details within the scope not departing from the gist of the invention.

It is the schematic which shows the whole structure of the retractable fence pillar which concerns on embodiment of this invention, Comprising: It is the figure which represented the substantially upper half part of the outer cylinder 2 as a longitudinal cross-section, and represented the column 3 as a front view. It is a disassembled perspective view which shows the upper structure of the outer cylinder 2 in the said retractable fence pillar. Similarly, it is a longitudinal sectional view showing the upper structure of the outer cylinder 2. It is a disassembled perspective view which shows the lower part structure of the column 3 in the said retractable fence pillar. It is a cross-sectional view of the intermediate part of the above-mentioned retractable fence post. It is a cross-sectional view of the columnar support device 6 in the above-described retractable fence column. It is a fragmentary longitudinal cross-section which shows the structure and operating state of the stop cam 11 in the said retractable fence pillar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Retractable fence pillar 2 Outer cylinder 3 Column 4 Constant load spring 8 Operation rod 9 Engagement protrusion 10 Window-shaped opening 11 Stop cam 25 Operation pin 41 Operation pin connection pipe 45 Compression coil spring (spring member)
46 Torsion coil spring (spring member)
66 First engagement claw 71 Second engagement claw

Claims (4)

An outer cylinder embedded in the ground and a column body that can be moved up and down in the outer cylinder, and a coiled constant load spring is attached to the lower part of the column body with its rotation axis facing sideways. In the retractable fence column configured such that the tip of the constant load spring is connected to the upper part of the outer cylinder, and the column body is biased in the upward direction by the hoisting force of the constant load spring,
An operation rod extending in the vertical direction is arranged outside the outer cylinder, and an engagement protrusion for restraining the lifting and lowering of the column body is provided at an appropriate position including the vicinity of the lower end portion and the vicinity of the upper end portion of the operation rod. While the mating protrusion is disposed so as to protrude into the outer cylinder through a window-like opening formed on the peripheral surface of the outer cylinder,
A stop cam that engages with the engagement protrusion at a predetermined lift position is provided at a lower portion of the column body, and the operation rod is rotated by rotating the operation rod about the axis from above the outer cylinder. A retractable fence column characterized in that the engagement with the stop cam is released and the column body can be moved up and down.   The stop cam includes a first engagement claw and a second engagement claw that are arranged to face each other in the vertical direction, and the upper first engagement claw comes into contact with the engagement protrusion when the column body rises. When the column body descends, the second engagement claw is urged so as to protrude outward and engage with the engagement projection, while the second engagement claw is engaged with the engagement projection when the column body descends. 2. The retractable fence column according to claim 1, wherein the rail column is urged so as to protrude into the outer side and engage with the engaging protrusion when the column body is raised.   The operating rod is urged so as to return to a position where the engaging projection faces the window-like opening of the outer cylinder by an elastic force of a spring member inserted around the axis thereof. The haunting fence column according to 1 or 2.   An operating pin is connected to the upper end portion of the operating rod via an operating pin connecting pipe with a spring member built in. The operating pin is provided so that it can be pushed into the operating rod from above, and the operating pin is pushed in. 4. The retractable fence post according to claim 1, further comprising a lock means that allows the operation rod to rotate only occasionally.

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