JP4912851B2 - Avalanche and rockfall protection fence - Google Patents

Description

  The present invention relates to an avalanche / falling rock protection fence.

Generally, as this type of protective fence, support posts are provided at predetermined intervals, and horizontal rope material is moored between each support in a state that allows horizontal sliding, and both ends of the horizontal rope material are fixed, and between each support post. Absorbs the impact energy reaching the holding rope in the middle of the protective fence (for example, Patent Document 1) shielded by a wire net hooked on a horizontal rope material and the holding rope stretched between struts The brake device has a loop pipe in which both ends overlapped with each other are fixed by a tightening member, the holding rope passes through the loop pipe, and the pipe port at the other end. A protective fence (for example, Patent Document 2) that absorbs energy by friction of the loop tube overlapping portion at the tightening portion and friction between the loop tube and the tightening member, and a mountain on the mountain side and the upper portion of the support column. And below Such as Tsuridana type of protective fence connected by installation for the rope the door are known.
Japanese Patent Publication No. 7-18134 JP-A-10-88527

  As in the above-mentioned Patent Document 1 or 2, steel fences and concrete fences are widely used as protective fences, but these substructures are constructed in advance with cast-in-place concrete on the slope, and this substructure is supported. It was a structure that built a superstructure on the fence as a body, and it was necessary to cut the slope and construct the substructure on site.

  The suspension fence type guard fence does not require a substructure, but it is a structure in which the superstructure is supported and fixed by a rope for installation, and the struts of the superstructure are only placed on the ground. Therefore, there is a problem of lack of stability as compared with the case where the substructure is provided.

  Therefore, an object of the present invention is to provide an avalanche / falling rock prevention fence that is inexpensive and excellent in durability by improving a structure for mounting a column to an installation location.

In the invention of claim 1, in the avalanche / falling rock protection fence in which a plurality of support posts are provided on a slope at predetermined intervals on the left and right sides, and a net body is provided between the support posts, the support posts are erected so as to be tiltable in all directions, The upper and lower sides of the pillar and the slope on the mountain side are respectively connected by rope materials, an anchor member is embedded in the slope corresponding to the installation location of the pillar, and a crushed stone filling portion is provided on the slope corresponding to the anchor member. The crushed stone filling portion is formed in a portion surrounded by a horizontal bottom surface portion, an inclined bottom surface portion connecting the ground-side tip of the horizontal bottom surface portion and the upper portion of the anchor member, and the slope. It is formed by filling crushed stone, the crushed stone filling part has a predetermined width in the left-right direction, and the tilting structure that allows the column to be tilted is provided at the installation position of the column and the column. , An engaging protrusion standing on the slope, and a lower part of the column It is a engaging receptacle in which the engaging protrusion is loosely fitted, in which the engagement protrusion is fixed to said anchor member.

According to a second aspect of the present invention, the engagement receiving portion has an engagement hole opened in the lower portion of the support column, and a locking head that is engaged with the upper portion of the engagement hole at the upper portion of the engagement protrusion. A part is provided.

The invention according to claim 3 is a steel pipe in which the anchor member is thinner than the support column.

According to a fourth aspect of the present invention, there is provided a rotation connecting member for connecting the upper portion of the support column and the rope member so as to be vertically and horizontally rotatable.

The invention according to claim 5 is such that the connecting portion between the mesh body and the support column is two upper and lower portions.

According to a sixth aspect of the present invention, the mesh body in which the upper and lower sides are connected to the support column has a bending portion.

According to the structure of claim 1, since the support column can tilt in all directions, in addition to the load such as snow pressure in the horizontal direction of the slope to be considered at the time of design, the support column is caused by the settling force of snow or the unevenness of the slope. It can flexibly respond to changes in the load and direction applied obliquely, expanding the range of functions as a protective fence and improving durability.

  Moreover, since the crushed stone filling part is formed in the slope and the anchor member is disposed here, the support column can be stably installed.

Moreover, according to the structure of Claim 1 , the support | pillar can be tilted to all directions by setting the support | pillar so that the engagement protrusion erected in the installation place may insert the engagement receiving part of a support | pillar lower part. be able to.

Moreover, according to the structure of Claim 2 , when a support | pillar falls down only the predetermined angle, a locking head will be locked by the upper part of an insertion hole, and the fall of the support | pillar beyond it can be prevented.

Moreover, according to the structure of Claim 1, the engagement protrusion used as the rotation center of a support | pillar can be fixed with an anchor member.

Moreover, according to the structure of Claim 3 , compared with the past, the construction which is easy and cheap can be obtained, and generation | occurrence | production of subsidence, a shift | offset | difference, etc. of a support | pillar lower part can be prevented.

Moreover, according to the structure of Claim 4 , the connection location of a support | pillar and a rope material rotates corresponding to tilting of a support | pillar, and unreasonable force is not added to those connection location vicinity.

Further, according to the configuration of claim 5 , the cross-sectional force generated in the support column is used as an axial force, whereby the moment applied to the support column can be made substantially zero, the cross-section of the support column can be reduced, and the cost can be reduced. Can be achieved.

Moreover, according to the structure of Claim 6, the snow pressure etc. which are applied to a net body can be received flexibly, and the tension | tensile_strength etc. which generate | occur | produce in the member which comprises a net body can be reduced.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, a new avalanche / falling rock prevention fence different from the conventional one is obtained, and an avalanche / falling rock prevention fence is obtained.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 17 show Embodiment 1 of the present invention. As shown in FIG. 1, an avalanche / falling rock protection fence 1 has a plurality of support pillars 2R at predetermined intervals on a slope S or a lower part of a slope. , 2, 2 and 2L, and the net 3 is provided between the support columns 2R, 2, 2 and 2L. Y indicates the mountain side of the protective fence 1.

  The struts 2R, 2 and 2L are made of steel pipes or the like, and anchor members 4 are inserted into the slope S corresponding to the positions where the struts 2R, 2 and 2L are installed. In this example, the anchor members 4 Is made of a steel pipe thinner than the columns 2R, 2 and 2L, the lower end of the anchor member 4 is cut obliquely and sharply formed, and a flange 4A is provided at the upper end. Corresponding to the anchor member 4, a crushed stone filling portion 5 is formed on the slope S. The crushed stone filling portion 5 is formed in a portion surrounded by a slope S and a horizontal bottom surface portion 5A in the horizontal direction, an inclined bottom surface portion 5B connecting the ground-side tip of the horizontal bottom surface portion 5A and the upper portion of the anchor member 4, and the slope S. Filled with crushed stone. The crushed stone filling portion 5 has a predetermined width in the left-right direction, and is provided for each column.

  As shown in FIGS. 7 to 8, the anchor member 4 is inserted in the vertical center of the slope S of the crushed stone filling portion 5, and the base plate 6 is fixed to the upper end of the anchor member 4. . In this example, the flange portion 4A of the anchor member 4 and the base plate 6 are fixed with bolts and nuts. In addition, a female screw hole 7 is formed at the center of the base plate 6 and a female screw cylinder 8 is fixed to the lower center of the base plate 6, and the female screw cylinder 8 is inserted into the anchor member 4. The screw rod 9 is continuously screwed into the female screw hole 7 and the female screw cylinder 8, and the upper portion of the screw rod 9 projects upward from the upper surface of the base plate 6.

  As shown in FIG. 5 and the like, a circular recess 10 is formed on the central upper surface of the base plate 6, and the lower end of the engagement protrusion 11 is inserted into the recess 10, and the lower end of the engagement protrusion 11 is The engagement protrusion 11 is fixed to the anchor member 4 by being screwed onto the screw rod 9.

  The engaging projection 11 includes a main body 12 having a truncated conical shape and a height dimension higher than the diameter of the lower end, and a locking head 13 integrally provided on the upper portion of the main body 12. Includes a tapered enlarged portion 13A that expands upward and a cylindrical portion 13B provided on the upper portion. Further, a ring-shaped tilt guide plate 14 is provided at the center of the base plate 6, and a hole 14A for inserting the lower portion of the main body 12 is provided at the center of the tilt guide plate 14, and the tilt guide is further provided. A curved surface 14B is formed on the outer periphery of the plate 14, and in this example, the curved surface 14B is semicircular. The curved surface 14B may be provided only on the outer peripheral upper corner.

  A tilt plate 15 placed on the tilt guide plate 14 is fixed to the lower ends of the columns 2R, 2 and 2L. The tilt plate 15 is orthogonal to the columns 2R, 2 and 2L. The outer diameter of the tilting plate 15 is larger than that of the base plate 6, and an engaging hole 16 is formed in the center of the tilting plate 15. The inner peripheral surface of the engaging hole 16 is formed on a curved surface 16A. In the example, it is semicircular. The main body 12 is inserted into the engagement hole 16. In addition, a hollow portion 17 continuous with the engagement hole 16 is formed in the lower part of the support columns 2R, 2 and 2L, and the engagement protrusion 11 is loosened by the engagement hole 16 and the hollow portion 17. An engagement receiving portion 18 to be fitted is configured, and the tilting structure 19 includes the engagement protrusion 11 and the engagement receiving portion 18.

  Then, as shown in FIG. 6, when the column 2 is tilted, the lower lower surface of the inclined tilting plate 15 tilts while sliding along the curved surface 14B of the tilting guide plate 14, and the engagement hole 16 When the curved surface 16A slides on the main body 12 of the engaging protrusion 11, and when it is inclined more than a predetermined angle, the upper edge that is inclined and is the upper part of the upper side of the engaging hole 16 is formed on the locking head 13. Engage in the contact state and prevent further tilting. In this example, the columns 2R, 2 and 2L can be tilted by about 40 degrees in all directions.

The lower part of the column 2 and the ground on the mountain side, which is the front side, are connected by an installation rope material, and the upper part of the columns 2R, 2 and 2L and the ground are connected by a back rope material, and the columns 2R, 2 and 2L on the rear side of the upper and lower, the net body 3 is connected, further, between the upper portion of the column 2, 2, Ru Tei provided spacing holding rope materials.

  Therefore, as shown in FIG. 7 and the like, the lower part of the support columns 2R, 2 and 2L are provided with a connecting part 21 for a rope for installation and a connecting part 22 for a net body in front and rear (mountain side, valley side). The connecting portions 21 and 22 include a ring 101 fixed to the support column 2 and a hole 102 formed at the center of the ring 101, and the end of the rope member is connected using the hole 102. Further, the lower part of the lower ring 101 is fixed to the tilting plate 15, and the upper part of the ring 101 is also fixed to the reinforcing ring 20 fixed to the support column 2.

  Similarly, as shown in FIG. 13 and the like, an installation rope connecting portion 23 and a net connecting portion 22 are provided on the upper portion of the support column 2 before and after, and the connecting portions 23 and 21 are provided as follows. The ring 101 includes a ring 101 fixed to the columns 2R, 2 and 2L, and a hole 102 formed in the center of the ring 101. The end of the rope member is connected using the hole 102. The lower ring 101 is also fixed to upper and lower reinforcing rings 20, 20 fixed to the support column 2.

  Further, as shown in FIGS. 12 and 13, a lid body 24 is provided at the upper ends of the pillars 2R, 2 and 2L, and the upper part of the pillars 2, 2L and 2R is provided. 25, and by connecting the spacing rope material 26 to the connecting shaft 25, the upper portions of the adjacent struts 2R, 2, 2, 2L are coupled by the spacing rope material 26.

  Next, the rope fixing anchor 31 provided on the slope S will be described. As shown in FIGS. 8 to 9, the anchor 31 has a hole 32 formed on the slope 3, and a screw rod 33 coated with an epoxy resin powder is inserted into the hole 32. A nut 34 is screwed to the tip, and a plurality of spacers 35 are provided at the center in the longitudinal direction of the screw rod 33, and the screw rod 33 is fixed by filling the hole 33 with a grout material 36. ing.

  Further, an anchor side connection fitting 41 is attached to the tip of the screw rod 33. This connection metal fitting 41 is formed in a U-shape integrally provided with side plate portions 43, 43 on both sides of the main body base 42, and a cylindrical portion 44 is integrally provided on the main body base 42, and the cylindrical portion 44, the main body base 42, The end of the screw rod 33 is inserted through the nut 45, and a nut 45 is screwed into the end of the screw rod 33. Between the side plate portions 43, 43, connecting pins 46, 46 for connecting the rope material are mounted vertically.

  In addition, a column-side connection fitting 51 is attached to the installation rope coupling portion 21 and the stay rope coupling portion 23 of the columns 2R, 2 and 2L. As shown in FIGS. 10 to 11, the connection fitting 51 that is a rotation connecting member includes a vertical connecting member 52 and a horizontal connecting member 53.

  As shown in FIGS. 12 to 16, the vertical connecting member 52 has a screwed pin 54 </ b> A inserted through holes 54 </ b> K and 54 </ b> K of a pair of vertical holding plates 54 and 54 sandwiched between the ring 101 and the screw. By inserting the attached pin 54A into the hole 102, the vertical connecting member 52 is connected to the connecting portions 21 and 23 so as to be pivotable in the vertical direction around the screwed pin 54A. A pair of lateral clamping plates 55, 55 are formed in the intersecting direction, and connection holes 55A, 55A are formed in the lateral clamping plates 55, 55.

  The horizontal connecting member 53 has a pair of base plates 56, 56 arranged at intervals, and the centers thereof are connected by a shaft 57. The pair of base plates 56, 56 are connected to the connecting holes 55A, 55A. Correspondingly, connecting holes 56A, 56A are drilled, and the connecting holes 55A, 56A, 56A, 55A are threaded with the pair of base clamping plates 55, 55 sandwiched between the pair of base plates 56, 56. By inserting the pin 58, the threaded pin 53 is connected to the vertical connection member 52 so as to be rotatable in the left-right direction around the connection bolt 58.

  Further, three holes 56B, 56B, 56B for inserting threaded pins 59, 59A, 59A are inserted through the pair of base plates 56, 56, and these threaded pins 59, 59A, 59A and the above-mentioned screws are attached. The pins 58 are arranged at the corners of the square. That is, the threaded pins 59, 59A, 59A are located on the front, center left, and center right. In this case, the front is the mountain Y side.

  In addition, when connecting with the connection part 22 for net bodies, as shown in FIGS. 13-14 etc., the pin 59 with a screw | thread is located in the back (anti-mountain side). Further, the connecting metal 51 connected to the connecting part 22 for the mesh body is formed slightly larger than the connecting metal 51 connected to the connecting parts 21 and 23. However, since the basic configuration is the same, the same reference numerals are given. is doing.

  Next, the installation rope member 62 and the stay rope member 61 will be described. As shown in FIGS. 1 to 3, the three anchors 31, 31, 31 are provided side by side on the slope S on the mountain side of the intermediate struts 2, 2. These are provided on the left and right. The connecting portion 21 for the installation rope at the lower part of the intermediate strut 2 and the connecting pin 46 under the connection fitting 41 are connected by the installation rope material 62. Specifically, the central anchor 31 and the front anchor 31 The threaded pin 59 is connected by the installation rope member 62, and the left and right anchors 31, 31 and the center left and right threaded pins 59A, 59A are connected by the installation rope member 62. The center and left and right installation rope members 62 and 61 form an angle of about 20 degrees on a plane.

  In the same manner, the connecting portion 23 for the upper rope of the intermediate strut 2 and the connecting pin 46 on the connection fitting 41 are connected by the lower rope material 61, specifically, The anchor 31 and the front threaded pin 59 are connected by a retaining rope member 61, and the left and right anchors 31, 31 and the center left and right threaded pins 59A, 59A are coupled by a retaining rope member 61. The center and left and right stay rope members 61, 61 form an angle of approximately 20 degrees in a plane.

On the other hand, as shown in FIGS. 1 to 3, the left and right strut 2L, 2R, the anchor 31, 31 are arranged in the its right in front and anterolateral. An installation rope connecting portion 21 below the support 2L at the left end and a connection pin 46 below the connection fitting 41 are connected by an installation rope material 62. Specifically, the left and right supports 2L, 2R connects the center anchor 31 and the front threaded pin 59 with the installation rope material 62, and the left end column 2L connects the left anchor 31 and the center left threaded pin 59A with the installation rope material 62. The post 2R at the right end of the right anchor 31 is connected to the center right threaded pin 59A of the right anchor 31 by the installation rope member 62. The central and outer installation rope members 62 and 61 form an angle θ of approximately 50 degrees on a plane.

  Similarly, the connecting portion 23 for the upper ropes on the left and right columns 2L and 2R and the connecting pin 46 on the connection fitting 41 are connected by the auxiliary rope material 61. Specifically, The left and right struts 2L, 2R connect the center anchor 31 and the front threaded pin 59 with a reed rope material 61, and the left end strut 2L includes the left anchor 31 and the center left threaded pin 59A. Are connected by a storage rope member 61, and the support 2 </ b> R at the right end portion is connected by a storage rope member 61 to the center right threaded pin 59 </ b> A of the right anchor 31. The center and outer stay rope members 61, 61 form an angle of approximately 50 degrees on a plane.

  As will be described later, the installation rope member 62 and the stay rope member 61 are also connected to the rear of the columns 2R and 2L. Further, tension adjusting means such as turnbucks may be provided in the middle of the installation rope member 62 and the holding rope member 61.

  Next, the net body 3 will be described. As shown in FIG. 17, the net body 3 includes horizontal rope members 71 and 71 in the horizontal direction at the top and bottom, and vertical rope members 72 and 72 in the vertical direction on the left and right. It has parts 71A and 72A. Then, between the upper and lower horizontal rope members 71, 71, the intermediate vertical rope member 73 is routed from the top to the bottom, and below this, there is provided an additional portion 73S that substantially follows the lower horizontal rope member 71, and the end of the additional portion 73S In the reverse direction, it is routed from the bottom to the top, and an additional portion 73S is provided on the upper horizontal rope member 71, and the end portion of the additional portion 73S is folded upward, and is again routed from the top to the bottom. A predetermined interval is provided between the intermediate vertical rope members 73. In addition, this space | interval is about several 10 cm, for example, is about 30-80 cm.

  Further, between the vertical rope members 72, 72, the intermediate horizontal rope member 74 is routed from the left to the right, and a right portion 74S that substantially follows the right vertical rope member 72 is provided on the right side, and folded at the end of the additional portion 74S. On the contrary, it is routed from right to left, and on this left is provided a follower portion 74S that approximately follows the vertical rope member 72, folded back to the right at the end of this follower portion 74S, routed again from right to left, and adjacent to the horizontal side A predetermined interval is provided between the rope members 74. In addition, this space | interval is about several 10 cm, for example, is about 30-80 cm. The intermediate vertical rope member 73 and the intermediate horizontal rope member 74 are fixed by, for example, binding the intersections with the rope members 71 and 72.

  The rope members 71, 72, 73, 74 form a substantially grid-like net. Further, the net body 3 is formed by superimposing a wire mesh 75 having a smaller mesh size on these rope members 71, 72, 73, 74.

  Next, a connection structure of the mesh body 3 to the mesh body connection portion 22 will be described. The strut-side connection fitting 51 is connected to the mesh connecting portion 22. That is, the column-side connection fittings 51 are coupled to the upper and lower sides of the column. This connection is the same as the connection structure between the connection parts 21 and 23 and the connection fitting 51. Then, the upper and lower ring portions 72A and 72A of the vertical rope member 72 of the mesh body 3 are connected to the upper and lower threaded pins 59 and 59, and in this state, as shown in FIG. Bend. In addition, the left and right ring portions 71A, 71A of the horizontal rope member 71 are connected to the corresponding left and right threaded pins 59A, 59A, and in this state, as shown in FIG. In the attached state, a bending portion 3A is formed on the center side of the net body 3 as shown in FIG.

  Further, as shown on both the left and right sides of FIGS. 1 and 2, the connection fitting 51 connected to the upper and lower mesh connecting portions 22 and 22 has a holding rope member 62 and an installation rope member on a screwed pin 59A on the outer side. 61 are connected to each other, and the rope members 62 and 62 are connected to the upper and lower connecting pins 46 and 46 of the connection fitting 41, and the rope members 62 and 62 on both sides are about 73 degrees with respect to the front-rear direction in a plane. Make an angle.

Thus, in this embodiment, corresponding to claim 1 , a plurality of support columns 2R, 2, 2, 2L are provided on the slope S at predetermined intervals on the left and right sides, and a mesh body is provided between the support columns 2R, 2, 2, 2L. In the avalanche / falling rock protection fence provided with 3, the pillars 2R, 2, 2, 2L are erected so as to be able to tilt in all directions, and the slope S which is a natural mountain on the top and bottom of the pillars 2R, 2, 2, 2L and the mountain side Y Are connected with a rope member 61 and an installation rope member 62, which are rope members, and anchor members 4 are embedded in the slope S corresponding to the installation positions of the support columns 2R, 2, 2, 2L. A crushed stone filling portion 5 is formed on the slope S. The crushed stone filling portion 5 includes a horizontal bottom surface portion 5A in the horizontal direction, a tip on the ground side of the horizontal bottom surface portion 5A, and a slope S on the upper portion of the anchor member 4. Filled with crushed stone in the portion surrounded by the sloped bottom surface 5B and the slope S. The part 5 has a predetermined width in the left-right direction, and allows the support columns 2R, 2, 2, 2L to be tilted to the installation positions of the support columns 2R, 2, 2, 2L and the support columns 2R, 2, 2, 2L. A tilting structure 19 is provided. The tilting structure 19 is provided with an engaging projection 11 standing at an installation location, and an engagement receiving portion 18 provided in the lower part of the support columns 2R, 2, 2, 2L to which the engaging projection 11 is loosely fitted. Since the support protrusions 2R, 2, 2, 2L can be tilted in all directions because the engaging protrusion is fixed to the anchor member, in addition to loads such as snow pressure in the horizontal direction of the slope S considered during design, The width of the function as the protective fence 1 can flexibly cope with the load (other than vertical) applied to the pillars 2R, 2, 2 and 2L obliquely due to settling force such as snow and unevenness of the slope S, and changes in the direction. Spreads and durability is improved.

Moreover, since the crushed stone filling part 5 is formed in the slope S and the anchor member 4 is arrange | positioned here, the support | pillars 2L, 2 and 2R can be installed stably.

Thus, in this embodiment, corresponding to claim 1 , the support columns 2R, 2, 2, 2L are tilted to the installation locations of the support columns 2R, 2, 2, 2L and the support columns 2R, 2, 2, 2L. The tilting structure 19 is provided, and the tilting structure 19 is engaged with the engaging protrusion 11 standing at the installation location and the engaging protrusion 11 provided loosely on the lower portions of the columns 2R, 2, 2, 2L. Since the support part 18 is provided, the support pillars 2R, 2 and 2L are set by setting the support pillars 2R, 2, 2 and 2L so that the engaging projections 11 standing at the installation place are inserted into the engagement receiving part 18 at the lower part of the support pillar. , 2, 2L can be tilted in all directions.

In this way, in this embodiment, corresponding to claim 2 , the engagement receiving portion 18 has the engagement holes 16 opened in the lower portions of the columns 2R, 2, 2, 2L, and the engagement protrusions 11 Since the locking head 13 that locks to the upper part of the engagement hole 16 is provided at the upper part, the locking head 13 becomes the upper part of the engagement hole 16 when the columns 2R, 2, 2, 2L are tilted by a predetermined angle. It can be locked to the upper edge to prevent the support columns 2R, 2, 2, 2L from falling over.

In this way, in this embodiment, in accordance with claim 1 , the anchor member 4 is embedded in the slope S which is the installation location, and the engaging projection 11 is fixed to the anchor member 4. The engaging protrusion 11 that becomes the rotation center of 2R, 2, 2, 2L can be fixed to the slope S.

In this way, in this embodiment, corresponding to claim 3 , since the anchor member 4 is a steel pipe thinner than the columns 2R, 2, 2, 2L, the basic structure is easier and cheaper to construct than before. And the occurrence of subsidence or displacement of the lower portions of the columns 2R, 2, 2, 2L can be prevented.

In this way, in this embodiment, corresponding to claim 4 , the upper portion of the support columns 2R, 2, 2 and 2L and the rope members 62 and 62 are rotational connection members that connect the rope members 62 and 62 so as to be vertically and horizontally rotatable. Since the connection fitting 51 is provided, the connecting portion between the support pillars 2R, 2, 2, 2L and the rope members 62, 62 rotates, and an excessive force is not applied in the vicinity of the connecting portion.

In this way, in this embodiment, since the connecting portion between the net body 3 and the pillars 2R, 2, 2, 2L is two places on the upper and lower sides corresponding to claim 5 , the pillars 2R, 2, 2, The sectional force generated in 2L is used as an axial force, so that the moment applied to the supports 2R, 2, 2, 2L can be made substantially zero, and the cross section of the supports 2R, 2, 2, 2L can be reduced. Cost reduction can be achieved.

In this way, in the present embodiment, in correspondence with claim 6 , the net body 3 whose upper and lower sides are connected to the support columns 2R, 2, 2 and 2L has the bending portion 3A. Etc. can be received flexibly, and tension generated in members such as the rope members 71, 72, 73, 74 constituting the net body can be reduced.

Further, as an effect of the present embodiment, a curved surface 14B is formed on the outer periphery of the tilt guide plate 14, and the inner peripheral surface of the engagement hole 16 is formed on the curved surface 16A. The lower side of the inclined tilting plate 15 is tilted while sliding along the curved surface 14B of the tilting guide plate 14, the curved surface 16A of the engaging hole 16 slides on the main body 12 of the engaging projection 11, A smooth tilting operation can be performed, and an excessive force is not applied to the member . Et al is, post 2L, also the bottom of the 2,2R, because connecting the pivotal coupling member serving fitting 51 for coupling to be vertically and horizontally rotated, posts 2L, even if 2,2R is tilted installation An unreasonable force is not applied to the connecting portion between the rope material 61 for use and the supports 2L, 2 and 2R. In addition, a force for pulling the support columns 2L, 2R outward is applied by the holding rope members 61, 61 outside the protective fence 1, whereas a spacing holding rope material 26 is provided between the support columns 2L, 2, 2, 2R. Therefore, a stable structure can be obtained even if the columns 2L, 2, 2R can be tilted. Further, since the support pillars 2L, 2 and 2R can be attached to and detached from the engaging protrusion 11, installation and removal can be easily performed.

In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible .

It is a whole top view showing Example 1 of the present invention. It is a whole front view same as the above. It is a whole side view same as the above. It is sectional drawing of the state which decomposed | disassembled the support | pillar lower part same as the above. FIG. 3 is a plan sectional view of the lower part of the column. It is sectional drawing of the support | pillar lower part explaining a tilting operation same as the above. It is sectional drawing of a support | pillar lower part same as the above. It is a sectional view of an anchor same as the above. It is a front view of the metal fitting for connection provided in the anchor same as the above. FIG. 10A is a plan view, and FIG. 10B is a side view. FIG. 11A is a plan view, and FIG. 11B is a side view. It is a rear view of the upper part of the support | pillar which made the cross section the same as the above. It is an AA line sectional view of Drawing 12 same as the above. It is sectional drawing of a support | pillar upper part same as the above. It is a rear view of the lower part of the support | pillar which made the part a cross section same as the above. FIG. 16 is a cross-sectional view taken along line AA of FIG. It is a front view of the principal part of a net body same as the above.

DESCRIPTION OF SYMBOLS 1 Avalanche / fall rock protection fence 2 Prop 3 Net body 3A Deflection part 4 Anchor member 5 Crushed stone filling part
5A Horizontal bottom
5B Inclined bottom
11 Engagement protrusion
13 Locking head
14 Tilt guide plate
16 engagement hole
18 Engagement receiver
19 Tilt structure
24 lid
51 Connecting bracket (Tilt coupling member)
61 Reservoir rope material
62 Rope materials for installation

Claims (6)

In the avalanche / falling stone protection fence provided with a plurality of pillars on the slope at predetermined intervals on the left and right, the pillars can be tilted in all directions, and can be tilted in all directions. Each slope is connected with a rope material, an anchor member is embedded in the slope corresponding to the installation location of the support column, and a crushed stone filling portion is formed on the slope corresponding to the anchor member. The filling portion is filled with crushed stone in a portion surrounded by a horizontal bottom surface portion, an inclined bottom surface portion connecting the ground-side tip of the horizontal bottom surface portion and the upper slope of the anchor member, and the slope. The crushed stone filling portion has a predetermined width in the left-right direction, and is provided with a tilting structure that allows the column to be tilted at an installation location of the column and the column, and this tilting structure stands on the slope. The engagement protrusion provided, and the engagement provided at the bottom of the column And a engaging receptacle for Kiga loosely fitted, avalanches, rockfall fences, characterized in that the engagement protrusion is fixed to said anchor member. The engagement receiving portion has an engagement hole opened at a lower portion of the support column, and a locking head for locking to the upper portion of the engagement hole is provided above the engagement protrusion. The avalanche / falling rock protection fence according to claim 1 . Claim 1 or 2 avalanches, rockfall fences according to, characterized in that said anchoring member is a thin steel tube from the strut. The avalanche / falling rock protection fence according to any one of claims 1 to 3 , further comprising a rotation connecting member that connects the upper portion of the support column and the rope member so as to be vertically and horizontally rotatable. The avalanche / falling rock protection fence according to claim 1, wherein the net and the support are connected at two upper and lower positions. The avalanche / falling rock protection fence according to claim 5 , wherein the mesh body having the top and bottom connected to the support has a bending portion.

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