JP2011032829A - Guard fence with tilting support post - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guard fence having the structure facilitating fitting and removal of a support post by allowing tilting and twisting of the support post in all directions with a simple structure. <P>SOLUTION: In the guard fence comprising the support posts 10 tiltably erected at predetermined intervals and a guard net 20 spread between the support posts 10. Each of the support posts 10 has a free hinge device 30 which includes: a grounded plate having an anchor hole; a connecting pipe detachably connected to a lower part of the support post 10; a universal joint allowing the tilt and twist in all directions; and a restricting plate restricting the tilt in a specific direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a protective fence that can cope with falling rocks, avalanches, landslides, and the like, and more particularly, to a protective fence provided with a tilting support column that allows the support column to tilt in all directions.

Patent Document 1 discloses a protective fence in which a metal support is erected on a concrete foundation so as not to be tilted, and finally kinetic energy is supported and absorbed by the bending strength of the support.
The protective fence described in Patent Document 1 requires the use of a highly rigid support or the construction of a concrete foundation to support the support, and the workability is poor and the construction cost is high although the buffer performance is low. There is a difficulty that is attached.

Further, Patent Document 2 discloses a protective fence in which a hinge device is provided at the base portion of the support so that the support can be tilted.
The guard fence of patent document 2 couple | bonds the joint part of the metal plate attached on the concrete foundation, and the joint part of a support | pillar lower part with a pin hinge, and a support | pillar can incline toward the slope mountain side and the slope valley side.

JP 2009-24378 A JP-A-10-88527

The conventional protection fence has the following problems.
(1) The conventional hinge device has a structure in which the tilting direction of the support column is limited to the slope mountain side and the slope valley side, and cannot follow the tilting and twisting in other directions.
For this reason, if an external force other than the rotation direction of the hinge device acts upon receiving, the hinge device is easily destroyed.
(2) When standing upright, it is necessary to fix the grounding plate fixed to the lower part of the pillar with two or more anchors, and it takes time to fix the lower part of the pillar.
Further, when an external force other than the rotation direction of the hinge device is applied at the time of impact, the anchor is easily broken or pulled out.
(3) Generally, when the support is non-tilting, a support rope is supported between the top of the support and the slope mountain side to support the support, but when the support is tilted, the support rope on the slope mountain side is used. In addition, a rope is also stretched between the top of the column and the sloped valley.
Therefore, it is necessary to stretch at least two stay ropes on one tilting column, and the number of stay ropes to be installed increases as the entire protective fence.
(4) The conventional protective fence has a structure in which it is difficult to attach and remove the column.
For this reason, when the wintering is over with the protective fence standing, the protective fence is likely to be deformed and broken by snow pressure.

The present invention has been made in view of the above points, and an object of the present invention is to provide a protective fence including at least one tilting column.
<1> Allow tilting and twisting in all directions of the column with a simple structure.
<2> Simplify the fixing structure at the bottom of the column.
<3> Reduce the number of tie ropes.
<4> The structure is easy to mount and remove the column.

1st invention of this application is a protection fence which has the support | pillar standing upright and tilting at predetermined intervals, and the protection net stretched between support | pillars, Comprising: The support | pillar anchor provided in the slope, A free hinge device standing upright so as to be tiltable, the free hinge device having a ground plate having an anchor hole, a connecting cylinder detachably connected to a lower portion of the support, a lower surface of the connecting cylinder, and an opposite to the lower surface A universal joint that allows tilting and twisting in all directions formed between the opposing surfaces of the grounding plate, a restriction plate that stands on the top surface of the grounding plate and restricts tilting of the connecting cylinder in a specific direction, Provided is a protective fence provided with a tilting column, comprising a nut for screwing on a column anchor penetrating through an anchor hole of a ground plate and coupling a connecting cylinder to the ground plate.
According to a second invention of the present application, in the first invention, a hemispherical convex joint having a universal joint formed on one of the lower surface of the connecting cylinder and the opposing surface of the ground plate facing the lower surface, and the connecting cylinder A protective fence provided with a tilting column, wherein the protective fence is formed by a concave joint that is formed on any one of the lower surface and the opposing surface of the ground plate facing the lower surface, and can be fitted to the convex joint. I will provide a.
According to a third invention of the present application, in the first invention or the second invention, an adjustment bolt capable of abutting a connecting cylinder or a side surface of a support column is screwed onto the control plate so that the tilt control angle of the support column can be adjusted. A protective fence provided with a tilting column is provided.
According to a fourth aspect of the present invention, in the first or second aspect of the present invention, a tilting type is characterized in that a bolt is screwed to the side surface of the connecting cylinder and the column is detachable by fastening or loosening of the bolt. Provide a protective fence with a support.
A fifth invention of the present application is characterized in that, in any one of the first to fourth inventions, the free hinge device is installed on the slope with the connecting tube facing the slope valley side and the regulating plate facing the slope mountain side. A protective fence with a tilting support is provided.

According to the present invention, at least one of the following effects can be obtained.
<1> Since the free hinge device includes a universal joint with a simple structure, the column can be erected in a state in which the column is allowed to be freely tilted or twisted.
<2> Since the free hinge device can be fixed to the inclined surface by utilizing the anchor for the pillar connecting the universal joint, it is necessary to open a plurality of holes in the ground plate or to fix it with a plurality of anchor pins as before. Therefore, the fixing structure under the column can be simplified.
<3> Because the universal joint allows tilting in all directions without interfering with the anchor for the pillar that penetrates in the vertical direction, almost no shear force is applied to the anchor for the pillar at the time of impact, and the anchor for the pillar is destroyed. There is no danger of dripping or pulling out.
<4> Since the free hinge device can regulate the tilting range toward the slope mountain side, it is possible to omit the installation of the holding rope stretched between the upper part of the support column and the slope valley side.
Therefore, the number of anchors installed as well as the holding rope can be greatly reduced as the entire protective fence.
<5> The support can be attached to or detached from the free hinge device by a simple operation of simply tightening or loosening the bolts screwed to the connection box of the free hinge device.
<6> If the column is removed from the free hinge device before overwintering, deformation and destruction of the protective fence due to snow pressure can be avoided.

The perspective view of the guard fence presupposed by the present invention Vertical section of protective fence Perspective view of the upper part of the column in the protective fence Disassembled assembly drawing of free hinge device with part broken Enlarged view of the free hinge device with the bottom of the column assembled Sectional view of VI-VI in FIG. Sectional view of VII-VII in FIG. Explanatory drawing of installation method of free hinge device Illustration of the completed free hinge device

  Embodiments of the present invention will be described below with reference to the drawings.

<1> Assumed Guard Fence FIGS. 1 and 2 show a guard fence assumed by the present invention. In the present invention, the support column 10 is erected between the lower portion of the support column 10 and the ground so that the support column 10 can be tilted in all directions with a free hinge device 30 interposed.
The present invention is applicable to any protective fence provided with a tilting support column 10 standing at least at a predetermined interval and a protection net 20 stretched between the support columns 10.
Hereinafter, main components of the protective fence will be described.

<2> Column The column 10 may be a cylinder or a column having a cross-sectional shape that is square or circular, and may be a rigid body having a strength capable of supporting the protective net 20.

If necessary, a reserve rope (not shown) is stretched between the upper portion of the support column 10 and the slope mountain side.
Moreover, although the space | interval holding rope 28 is spanned by the span unit between the top parts of the adjacent support | pillars 10 and 10, the space | interval holding rope 28 is not essential.

<3> Protective Net The protective net 20 is a known net body formed of a rope material or a wire net for receiving a load such as falling rocks, and the support 10 supports the protective net 20 directly or indirectly.

  The protective net 20 of this example includes a net 21 knitted into a belt shape by engaging a plurality of rope rings 21a, and upper and lower support ropes 22, 23 provided continuously on the upper and lower sides of the net 21. Become.

<3.1> Suspension structure of the protection net In this example, the protection net 20 is arranged on the sloped valley side of the support column 10, and the protection net 20 is suspended by the upper and lower deployment ropes 25, 26 that form a pair. .

The upper and lower development ropes 25 and 26 are respectively inserted into guide holes provided through the upper and lower ends of the column 10, and one end is connected to the upper and lower support ropes 22 and 23. The other ends of the development ropes 25 and 26 are connected to a common brake device 27 provided on the slope mountain side via an anchor, and the tension acting on the upper and lower development ropes 25 and 26 is applied by one brake device 27. It can be absorbed.
The suspension structure of the protective net 20 and the load absorbing method by the protective net 30 and the brake devices 24 and 27 are disclosed in Japanese Patent Application Laid-Open No. 2002-256517 previously proposed by the applicant, and thus detailed description thereof is omitted. To do.

  FIG. 3 shows a form in which one end of the upper development rope 25 inserted through the guide hole 11 at the upper end of the support column 10 is connected to the upper support rope 22. The connection form of the lower development rope 26 and the lower support rope 23 shown in FIGS.

  Further, as shown in FIG. 1, the end portions of the continuous upper and lower support ropes 22 and 23 are connected to a common brake device 24 provided on the slope, and the tension acting on the upper and lower support ropes 22 and 23 is applied. Can be absorbed by one brake device 24.

<3.2> Brake device The brake devices 24 and 27 are, for example, a frictional sliding buffer including a plurality of clamping plates that sandwich one or a plurality of rope members from both sides, and bolts and nuts that tighten the plurality of clamping plates. However, it is possible to apply a known brake device. Each brake device 24, 27 is fixed to an anchor provided on a slope.

  In this example, the upper and lower deployed ropes 25 and 26 and the upper and lower support ropes 22 and 23 are respectively connected to the brake devices 24 and 27. However, the brake devices 24 and 27 are not essential elements of the protective fence, In some cases, the device may be omitted and each of these ropes secured directly to the anchor.

<4> Fixing means for the column In the present invention, the free hinge device 30 and the anchor 40 for the column are used as the fixing unit for the shock absorbing column 10.

<4.1> Column Anchor 40 The column anchor 40 shown in FIG. 5 is formed of a lock bolt, a steel rod, or the like, and has a screw formed at least at a site exposed on the ground surface. The support anchor 40 functions not only to fix the free hinge device 30 to the ground, but also to configure a universal joint mechanism 33 described later.

<4.2> Free Hinge Device FIGS. 4 to 6 show the free hinge device 30 in an enlarged manner.
The free hinge device 30 is a device that has both a pivot function that allows tilting and twisting of the support column 10 in all directions and a stopper function that restricts tilting of the support column 10 in a specific direction (slope mountain side) within a certain range.

  The free hinge device 30 is connected to a ground plate 31, a connecting cylinder 32 that accommodates the lower portion of the support column 10, a lower surface of the connecting cylinder 32, and a universal joint 33 provided on an opposing surface of the ground plate 31 that faces the lower surface. A regulation plate 34 erected on the upper surface of the ground plate 31 and a nut 35 for fixing the connecting cylinder 32 to the ground plate 31 by screwing to a support anchor 40 penetrating the ground plate 31 are provided.

<4.2.1> Grounding Plate The grounding plate 31 is a plate body having a rectangular shape for grounding on a slope and supporting the lower portion of the support column 10.
The ground plate 31 has a single anchor hole 31a in order to insert the support anchor 40 therethrough.

<4.2.2> Connecting cylinder The connecting cylinder 32 is a cylinder that can accommodate the lower part of the support column 10, and in this example, has a rectangular cross section according to the cross-sectional shape of the support column 10.
One or a plurality of bolts 36 are screwed to the side surface of the connecting cylinder 32, and the column 10 can be attached to and detached from the connecting cylinder 32 by tightening or loosening the bolts 36.

<4.2.3> Universal Joint The universal joint 33 is a joint that connects the connecting cylinder 32 to the ground plate 31 while allowing tilting and twisting in all directions, and a hemispherical convex joint 37 and the convex joint 37. And a concave joint 38 that can be fitted.
In this example, a case where a hemispherical convex joint 37 is provided on the lower surface of the connecting cylinder 32 and a concave joint 38 is formed on the ground plate 31 facing the convex joint 37 will be described.

The convex joint 37 is a protrusion that protrudes outward from the bottom surface of the connecting cylinder 32 and is formed, for example, by pressing a flat plate into a hemispherical shape.
An anchor hole 37 a having a diameter larger than that of the support anchor 40 is provided at the center of the convex joint 37. The anchor hole 37a has a dimensional relationship that does not interfere with the support anchor 40 when the connecting cylinder 32 is tilted.

On the upper surface of the ground plate 31, a cylindrical concave joint 38 is provided so as to be concentric with the anchor hole 31a.
The inner diameter of the concave joint 38 has a dimensional relationship that allows contact with the outer peripheral surface of the convex joint 37 so that the hemispherical convex joint 37 is allowed to rotate in all directions.
In this example, the case where the convex joint 37 and the concave joint 38 are in line contact is shown, but the two joints may be formed in surface contact.

  When connecting the connecting cylinder 32 to the ground plate 31, as shown in FIG. 5, a hemispherical washer 39 is accommodated in a convex joint 37, and a nut 35 is screwed into a column anchor 40 protruding from the hemispherical washer 39 and fastened. Thus, the convex joint 37 and the concave joint 38 are connected so as not to be separated.

The hemispherical washer 39 is not essential, and a hemispherical washer may be integrally formed on one side of the nut 35.
Further, the nut 35 is not limited to the screw connection, but includes a known alternative fastening means.

  The conventional tilting-type column tilts toward the slope mountain side and the slope valley side around the horizontal axis, but in the present invention, the connecting cylinder 32 tilts in all directions around the vertical column anchor 40.

  Instead of the forming members of the joints 37 and 38 constituting the universal joint 33, the concave joint 38 may be provided on the lower surface of the connecting cylinder 32, and the hemispherical convex joint 37 may be provided on the ground plate 31.

<4.2.4> Restriction plate In the vicinity of the concave joint 38, the restriction plate 34 erected on the upper surface of the ground plate 31 tilts the connecting tube 32 toward the approaching direction (slope mountain side) of the upright plate 34. It is a stopper for restricting to do.
An adjustment bolt 34a is threaded through the restriction plate 34.
The adjustment bolt 34a can come into contact with the connecting cylinder 32 or the side surface of the support column 10, and the tilt regulating angle of the connecting cylinder 32 can be adjusted by rotating the adjustment bolt 34a.

  The reason for restricting the tilt angle of the connecting cylinder 32 is to omit the holding rope stretched between the upper part of the support column 10 and the sloped valley, and the tilt restricting angle of the connecting cylinder 32 can be adjusted. The reason for this is to adjust the standing angle of the column 10 corresponding to the change in the slope of the different slopes at the installation site.

Reference numeral 34 b denotes a reinforcing rib provided between the back surface of the regulating plate 34 and the upper surface of the ground plate 31.
Further, as shown in FIG. 5, in this example, because of the relationship in which the lower development rope 26 is inserted into the guide hole 12 at the lower end of the support column 10, 32a and 34c are formed.

[How to stand upright]
Next, a method for standing the column 10 will be described.

<1> Installation of Grounding Plate As shown in FIG. 8, the grounding plate 31 is grounded to the inclined surface by inserting the anchor hole 31 a into the exposed portion of the support anchor 40.
When installing the ground plate 31, it is important to install the concave joint 38 toward the slope valley side and the regulation plate 34 toward the slope mountain side.

<2> Assembly of Universal Joint Next, as shown in FIG. 9, the convex joint 37 provided at the bottom of the connection box 39 is mounted on the concave joint 38 of the ground plate 31. At this time, the anchor hole 37a of the convex joint 37 is inserted into the exposed portion of the support anchor 40.
In order to connect both the joints 37, 38, the hemispherical washer 39 is inserted into the support anchor 40 positioned inside the connection box 39 and fastened with the nut 35 to complete the universal joint 33.

In the present invention, by fastening the nut 35 to the support anchor 40, not only the free hinge device 30 can be fixed to the slope, but also the universal joint 33 that can be tilted in all directions can be assembled.
Therefore, there is no need to open a plurality of holes in the ground plate 31 or fix with a plurality of anchor pins as in the prior art.

<3> Assembly of the Support Columns Finally, as shown in FIG. 5, the support column 10 can be fixed in a non-separable manner by simply inserting the lower portion of the support column 10 into the connection box 39 and tightening the bolts 36.

When the standing work of the column 10 through the free hinge device 30 is completed, the protective net 30 is attached between the columns 10 to complete the protective fence shown in FIG.
Since the column 10 of the free hinge device 30 or the side surface of the column 10 is in contact with the adjustment bolt 34a and further tilting is restricted, the column 10 is stretched between the upper part of the column 10 and the slope valley side. It is possible to omit the installation of the holding rope and the anchor.

[Operation of free hinge device]
When a load such as falling rocks acts on the protective net 20, tilting force acts on the support column 10 in all directions on the slope valley side through the upper and lower deployment ropes 25 and 26.
Since the column 10 is erected in a state that allows tilting and twisting in all directions except the sloped mountain side through the universal joint 33 of the free hinge device 30, the column 10 is a universal joint as shown by a two-dot chain line in FIG. Tilt around 33 and allow torsion.

  At this time, since the universal joint 33 does not interfere with the column anchor 40, there is no fear that the universal joint 33 will be broken. In addition, almost no shear force acts on the column anchor 40, and the column anchor 40 is broken or pulled out. Risk

[How to remove the column]
In order to remove the column 10, it is possible to remove the column 10 by a simple operation of simply loosening the bolt 36 of the free hinge device 30 and extracting the column 10 from the connection box 39.
Therefore, since the support fence post 10 can be removed before wintering, the protection fence can be prevented from being deformed and broken by snow pressure.
Even if the free hinge device 30 scattered on the slope is left, the snow pressure acting on the free hinge device 30 is small, so that the free hinge device 30 is not damaged by the snow pressure.
After melting snow, the support 10 is assembled to the connecting cylinder 32 of the free hinge device 30 and the protective fence is reassembled.

DESCRIPTION OF SYMBOLS 10 ... Prop 20 ... Protective net 25 ... Upper deployment rope 26 ... Lower deployment rope 24, 27 ... Brake device 30 ... Free hinge device 32 ... Connection box 33 ... Universal joint 34 ... Regulator plate 40 ... Still anchor

Claims (5)

A protective fence having a support column that can be tilted at a predetermined interval and a protective net that is stretched between the support columns;
An anchor for a column provided on the slope,
A free hinge device that stands upright so that the column can be tilted;
The free hinge device includes a ground plate having an anchor hole;
A connecting cylinder that is detachably connected to the lower part of the column;
A universal joint that allows tilting and twisting in all directions formed between the lower surface of the connecting cylinder and the opposing surface of the ground plate facing the lower surface;
A regulating plate that stands on the upper surface of the ground plate and regulates the tilting of the connecting cylinder in a specific direction;
A nut for connecting the connecting tube to the ground plate by screwing to the anchor for the pillar penetrating through the anchor hole of the ground plate;
Protective fence with tilting support.   2. The hemispherical convex joint formed on either one of the lower surface of the connecting tube and the opposing surface of the ground plate facing the lower surface, and the contact surface facing the lower surface of the connecting tube and the lower surface. A protective fence provided with an inclining support column, characterized in that it is formed on any other surface of the opposing surface of the main plate and is constituted by a concave joint that can be fitted to the convex joint.   The tilting type according to claim 1 or 2, wherein an adjustment bolt capable of abutting a connecting cylinder or a side surface of a support column is screwed onto the control plate so that the tilt control angle of the support column can be adjusted. Guard fence with support.   The protective fence provided with the tilting-type column according to claim 1 or 2, wherein a bolt is screwed to a side surface of the connecting cylinder, and the column is detachable by fastening or loosening of the bolt.   5. The tiltable column according to claim 1, wherein the free hinge device is installed on the slope with the connecting cylinder facing the slope valley and the regulating plate facing the slope mountain. Guard fence provided.

Images