JP6223719B2 - Guard fence support - Google Patents

Description

  The present invention relates to a protective fence post used for a protective fence provided on a roadside or a median strip of a road, and more particularly to a protective fence post that absorbs an impact caused by a vehicle collision or the like.

  Conventionally, guard rails, guard pipes, guard cables installed on roads, handrails installed on bridges (hereinafter referred to as “protective fences”) are fixed to pillars installed at intervals. Yes. Such a support | pillar has the objective which absorbs the impact force at the time of a vehicle collision, receives a vehicle, and aims at a passenger | crew's safety. Therefore, the support column is manufactured by a steel pipe (including a round metal pipe and a square metal pipe) having a predetermined supporting force or an H-shaped steel, and is welded to a base plate that is driven into the ground or fixed to the foundation. .

  By the way, when the strut welded to the base plate receives an impact force when the vehicle collides, if the welded joint portion (welded part) between the strut and the base plate breaks, the amount of shock energy absorbed by the strut is reduced. There is concern that it will drop rapidly. The welded portion breaks in this way because the welded portion does not follow the deformation of the support column. In response to such a problem, conventionally, the buckling of the pillar is promoted by forming a notch or a hole in the lower part of the lower part on the side where the pillar is buckled by impact force, and as a result, the buckling of the pillar is promoted. A technique has been proposed in which the load burden is reduced and the welded portion is prevented from being broken (see, for example, Patent Document 1).

JP 2008-95472 A

  However, in the case where a hole is provided in the support as in the conventional technique, it is conceivable that rainwater or dust enters from the hole. In particular, rainwater is considered to accumulate from the base plate to the lower end of the hole at a planar position, which is not preferable for rust prevention. Moreover, since the notch and the hole provided in the support | pillar become a part which can be visually recognized from the exterior and were missing, it was unpreferable on the landscape.

  Therefore, the problem to be solved by the present invention is to suppress the breakage of the welded portion between the column main body and the base plate without losing the column, and to improve the supporting force, and to prevent corrosion. It is to provide a protective fence post.

  In order to achieve the above object, a guard fence post according to the present invention described in claim 1 of the present invention includes a base plate fixed to a foundation, a closed cross-section hollow column body standing and joined on the base plate, The base plate is fixed to the foundation by a fixing member with the lane direction of the road as a width direction, and passes through a center portion in the width direction of the base plate and substantially orthogonal to the lane direction of the road. When the line to be used is a virtual folding line, the fixing member suppresses bending that suppresses bending about the virtual folding line in the base plate when the column main body receives a load via the transverse beam member. It is arranged at a position.

  According to the guard fence column of the present invention described in claim 1, when a line that passes through the center portion in the width direction of the base plate and is substantially orthogonal to the lane direction of the road is a virtual folding line, the virtual folding line is used as an axis. The bending of the base plate is suppressed by arranging the fixing member at the bending suppressing position for suppressing the bending.

  That is, by suppressing the bending of the base plate, it is possible to provide a protective fence column that suppresses the breakage of the welded portion between the column main body and the base plate and improves the supporting force and prevents corrosion.

  According to a second aspect of the present invention, there is provided the protective fence post according to the first aspect, wherein the fixing member is disposed on the road side of the base plate, and the anti-road side is located on the anti-road side. A fixing member is disposed, and two anti-road-side fixing members that are separated from each other in the lane direction of the road are arranged as the anti-road-side fixing member, and the bending suppression position is set to the two anti-roads. A position that is between two region defining lines that pass over the side fixing member and are substantially parallel to the virtual folding line, and is included in a range of approximately 45 degrees from the center of the column main body in the lane direction of the road It is characterized by being.

  According to the protective fence column of the present invention as set forth in claim 2, it passes over the two anti-road-side fixing members that are separated in the lane direction of the road as the bending suppression position, and is substantially parallel to the virtual folding line. Bending of the base plate is suppressed by disposing a fixing member between the two area defining lines and at a position included in a range of about 45 degrees from the center of the column main body in the lane direction of the road. For this reason, the fracture | rupture of the welding part of a support | pillar main body and a baseplate can be suppressed more.

  The guard fence post of the present invention described in claim 3 is the guard fence post according to claim 1 or 2, wherein the bending suppression position passes through the outer surface of the pillar body on the surface of the base plate. , Between two area defining lines that are substantially parallel to the imaginary folding line, and located within a range of approximately 45 degrees from the center of the column main body in the lane direction of the road. .

  According to the protective fence column of the present invention described in claim 3, between the two region defining lines that pass through the outer surface of the column body on the surface of the base plate and are substantially parallel to the virtual folding line as the bending suppression position. Then, the bending of the base plate is suppressed by disposing the fixing member at a position included in the range of about 45 degrees in the lane direction of the road from the center of the column main body. For this reason, the fracture | rupture of the welding part of a support | pillar main body and a baseplate can be suppressed more.

  According to a fourth aspect of the present invention, there is provided a guard fence post according to the first aspect of the present invention, wherein a reinforcement plate is provided in the vicinity of the welded portion between the base plate and the pillar body inside the pillar body. It is provided.

  According to the protective fence column of the present invention described in claim 4, since the reinforcing plate is provided inside the column main body, the welded portion between the column main body and the base plate is prevented from being broken and the supporting force is improved. Can be achieved.

  As described above, according to the protective fence column according to the present invention, it is possible to provide a protective fence column that suppresses breakage of the welded portion between the column main body and the base plate, and improves the supporting force and prevents corrosion.

It is the side view and top view which show the guard fence support | pillar which concerns on embodiment of this invention. It is a schematic diagram which shows the reinforcement plate of the protection fence support | pillar which concerns on embodiment of this invention. It is a schematic diagram which shows the experimental apparatus which concerns on embodiment of this invention. It is a figure which shows the arrangement pattern of the anchor bolt which concerns on embodiment of this invention. It is a table | surface which shows the result of the loading experiment of the load performed with respect to the arrangement | positioning pattern shown in FIG. It is a schematic diagram for demonstrating arrangement | positioning of the anchor bolt which concerns on embodiment of this invention.

  Hereinafter, a guard fence support according to an embodiment of the present invention will be described with reference to the drawings. The guard fence column according to the embodiment of the present invention is a guard fence column that supports a guard fence material such as a beam, a pipe, or a wire cable and constitutes a guard fence such as a guard rail, a guide pipe, a rail, or a guide cable, In particular, the present invention relates to a protective fence post that absorbs an impact caused by a vehicle collision or the like.

[1-1. Schematic configuration of protective fence support]
First, with reference to FIG. 1, the structure of the protection fence support | pillar which concerns on embodiment (henceforth this embodiment) of this invention is demonstrated. FIG. 1 is a schematic side view (a) and a plan cross-sectional view (b) showing the overall configuration of the guard fence post 1 of the present embodiment.

  As shown in FIG. 1 (a), a guard fence post 1 according to this embodiment includes a base plate 2 fixed to a foundation, and a column main body 3 having a closed cross section that is erected and joined to the base plate 2. It is roughly structured.

  A plurality of such protective fence columns 1 are installed at regular intervals along the road. And as shown to Fig.1 (a), the guard fence support | pillar 1 is the cross beam member B1, via brackets Br1 and Br2 used as attachment members at the center part and the upper end part in the height direction of the support body 3; By supporting B2, it functions as a protective fence.

  The transverse beam members B1 and B2 and the brackets Br1 and Br2 are not specific to the present invention, and can be configured by using known members, and thus detailed description thereof is omitted here.

  As shown in FIGS. 1A and 1B, the base plate 2 is made of a rectangular steel plate and has through holes 21a to 21d at predetermined positions. It fixes to attachment object G, such as a concrete foundation installed in the ground with this anchor hole Bo (Bo1 and Bo2), and a steel ground cover, through this through-hole 21a-21d.

  The anchor bolts Bо have two anti-road anchor bolts Bo1 on the anti-road side (left side of FIG. 1 (a)) and two road-side anchor bolts Bo2 on the road side (right side of FIG. 1 (a)). (See FIG. 6 described later).

  In this embodiment, the bending of the base plate 2 is suppressed by operating the bolt pitch of the two road side anchor bolts Bo2, thereby preventing the welded portion between the column main body 3 and the base plate 2 from being broken. Absorbs the impact force caused by the collision.

  Specifically, the two anchor bolts Bo2 on the road side are arranged at a bending suppression position SP (see FIG. 6 described later) that suppresses bending of the base plate 2 when the support main body 3 receives a load. .

  Here, the bending suppression position SP passes through the central portion Wo (see FIGS. 6B and 6C described later) of the base plate 2 in the width direction W, and is in the lane direction of the road (FIG. 6B described later). ) And (c) in the direction of the arrow Ld), when the virtual folding line Li2 is taken as a virtual folding line Li2, the bending of the base plate 2 with the virtual folding line Li2 as an axis when the column main body 3 receives a load is suppressed. Position. Details of the bending suppression position SP will be described later.

  When the two road-side anchor bolts Bo2 are arranged at the bending suppression position SP, the bolt pitches of the two road-side anchor bolts Bo2 are narrower than the bolt pitches of the two anti-road-side anchor bolts Bo1 ( (Refer FIG.6 (b) and (c) mentioned later).

  For this reason, it is formed so that the hole pitch of the through holes 21a and 21b through which the two road-side anchor bolts Bo2 pass among the through holes 21a to 21d described above is also narrower than the hole pitch of the through holes 21c and 21d. . The bending suppression position SP will be described later with reference to FIG.

  Although not shown, the base plate 2 may be constructed so as not to be exposed from the road surface by covering the surface with concrete or asphalt after installation on the ground.

  The column main body 3 is joined by welding in a state of being erected with respect to the base plate 2 before being installed on the road surface. The column main body 3 has a cylindrical shape with a circular cross section formed of a steel plate. The diameter of the column body 3 and the thickness of the steel plate constituting the column are set in consideration of the maximum support force required on the road where the protective fence column 1 is installed.

  Further, the column main body 3 includes a reinforcing plate 31 as a reinforcing member in the rising direction in the vicinity of the joint portion between the base plate 2 and the column main body 3. The reinforcing plate 31 is erected along a load direction applied to the column main body 3 when the column main body 3 is installed on the attachment target G.

  That is, as shown in FIGS. 1A and 1B, the load direction is indicated by an arrow, and the reinforcing plate 31 is installed with the surface thereof directed along the load direction. If this is the state in which the protective fence column 1 is installed on the road surface, the reinforcing plate 31 is provided in a direction orthogonal to the traveling direction of the vehicle on the roadway.

  Here, the reinforcing plate 31 is installed on the base plate 2 before welding the column body 3 to the base plate 2 or on the lowermost part of the hollow tube of the column body 3, The procedure of joining the column main body to the base plate 2 is performed.

[1-2. Detailed configuration of reinforcing plate]
Next, with reference to FIG. 2, the reinforcement plate of the guard fence support 1 of this embodiment is demonstrated. Fig.2 (a) is a schematic diagram which shows the guard fence support | pillar and reinforcement plate of this embodiment. FIG. 2B is a schematic diagram showing the reinforcing plate of the present embodiment.

  As shown in FIG. 2A, the reinforcing plate 31 includes a rigidity holding portion 32 that acts on the bending rigidity of the column main body 3 in the vicinity of the joint portion X between the column main body 3 and the base plate 2, and the load direction of the reinforcing plate 31. And a load distribution portion 33 formed so as to extend the height of the side facing the.

  That is, the rigid holding portion 32 is a substantially square portion formed below the reinforcing plate 31, and the load distribution portion 33 is a substantially triangular portion formed above the rigid holding portion 32. In other words, the reinforcing plate 31 is formed in a trapezoidal shape with the height of the end opposite to the load direction as the upper base and the height of the end opposite to the load direction as the lower bottom.

  Note that the rigidity holding portion 32 and the load distribution portion 33 are obtained by functionally dividing the reinforcing plate 31, and the reinforcing plate 31 is preferably configured integrally with a single steel plate. It is also possible to divide and form the holding portion 32 and the load distribution portion 33 and combine them by welding or the like.

  As described above, the rigidity holding portion 32 is a portion (area) that increases the bending rigidity in the vicinity of the joint portion X between the column main body and the base plate 2. In this case, the upper end portion on the opposite side to the load side of the rigid holding portion 32 becomes the buckling point N when the column main body is displaced by receiving the load.

  On the other hand, the load dispersion | distribution part 33 absorbs the load with respect to a support | pillar main body by a deformation | transformation, and disperses the deformation | transformation range of the support | pillar main body 3 by a load.

  Here, the height H of the end portion of the reinforcing plate 31 facing the load direction and the height h of the opposite end portion are good for the column main body against the set impact force of the vehicle collision. It is required by structural design that buckles by absorbing impact energy.

  When this is generalized, as shown in FIG. 2 (b), the height H of the end of the reinforcing plate 31 on the side facing the load direction is relative to a predetermined loading position L (see FIG. 1 (a)). Is set to about 1/5 or less.

  Also, the height h of the end of the reinforcing plate 31 opposite to the load direction is set to about 1/3 to 1/3 of the height H of the end opposite to the load direction. Preferably it is done. Since the plate thickness affects the absorption efficiency of impact energy, it can be appropriately adjusted according to the set impact force caused by a vehicle collision.

[1-3. Experimental example]
Next, in the guard fence post 1 having the above-described configuration, the bolt pitch of the two road side anchor bolts Bo2 is changed variously, and a load is applied with a predetermined position of the post body 3 as a loading position. The displacement amount of the column main body 3 and the floating amount of the base plate 2 were measured and shown in the table (FIG. 5).

(Experimental equipment: Fig. 3)
An example of the experimental apparatus is shown in FIG. FIG. 3 is a schematic diagram showing an experimental apparatus according to the present embodiment. In this experimental example, as shown in FIG. 3, a column body (diameter 114.3, plate thickness 4.5 mm) fixed to the base plate 2 having the above-described configuration is installed on a predetermined gantry K. A reaction force support P was installed at a position on the gantry K opposite to.

  Further, the hydraulic jack J is attached to the reaction force column P with the axis of the hydraulic jack J oriented in the horizontal direction. This hydraulic jack J is provided with a column holding member S for loading a horizontal load on the column main body. Between the hydraulic jack J and the column holding member S, a load cell R is provided as a sensor for detecting a load loaded by the hydraulic jack J.

  A displacement meter M is provided at the same height as the loading position by the hydraulic jack J at a position facing the reaction force strut P across the strut body 3. The displacement meter M measures the amount of displacement of the column body 3 that is rigidly or plastically deformed when a load is applied to the column body 3. Output values from the load cell R and the displacement meter M are input to the data logger D, and the result is input to the computer C.

  Here, in this experiment, the loading position of the load on the column body 3 is set to a position of 800 mm from the gantry K as shown in FIG. This is in accordance with the standards specified in the “Protection Fence Installation Standards and Explanation” (6th edition, June 10, 2009) published by the Japan Road Association.

(Experimental pattern: Fig. 4)
As shown in FIGS. 4 (a) to 4 (c), the arrangement patterns A to C in which the bolt pitches of the two road-side anchor bolts Bo2 described above are variously changed using the experimental apparatus as described above. A load loading experiment was conducted. FIG. 4A to FIG. 4C are schematic views showing road-side anchor bolt arrangement patterns A to C according to the present embodiment.

  The arrangement pattern A shown in FIG. 4A is an example in which the bolt pitch of the two road-side anchor bolts Bo2 is substantially equal to the bolt pitch of the two anti-road-side anchor bolts Bo1. Specifically, in this example, the bolt pitch of the two road side anchor bolts Bo2 is 180 mm. The bolt pitch of the anti-road side anchor bolt Bo1 is 180 mm in common as shown in FIGS. 4 (a) to 4 (c).

  The arrangement pattern B shown in FIG. 4B is an example in which the bolt pitch of the two road side anchor bolts Bo2 is made narrower than the bolt pitch of the two anti-road side anchor bolts Bo1. Specifically, in this example, the bolt pitch of the two road side anchor bolts Bo2 is set to 125 mm.

  The arrangement pattern C shown in FIG. 4C is an example in which the bolt pitch of the two road-side anchor bolts Bo2 is shorter than the bolt pitch of the two anti-road-side anchor bolts Bo1. Specifically, this is an example in which the pitch is 70 mm narrower than the pitch of the two road-side anchor bolts Bo2 shown in FIG.

(Experimental result: Fig. 5)
Next, FIG. 5 shows experimental results of arrangement patterns A to C (see FIGS. 4A to 4C) in which the bolt pitches of the two road side anchor bolts Bo2 are changed. FIG. 5 is a table showing the results of a load loading experiment performed on the arrangement pattern shown in FIG.

(Arrangement pattern A)
As shown in FIG. 5, in the arrangement pattern A (bolt pitch 180 mm), the base plate 2 floats 6 mm from the gantry K (see FIG. 3) at the position of the column main body displacement of 320 mm, and the joint portion between the base plate 2 and the column main body 3 A fracture occurred in the vicinity of the joint X in FIG.

(Arrangement pattern B)
As shown in FIG. 5, in the arrangement pattern B (bolt pitch 125 mm), the base plate 2 floats 4 mm from the gantry K (see FIG. 3) at the position of the column main body displacement of 400 mm, and the joint portion between the base plate 2 and the column main body 3 Fracture occurred.

(Arrangement pattern C)
As shown in FIG. 5, in the arrangement pattern C (bolt pitch 70 mm), the base plate 2 floats 2.5 mm from the gantry K (see FIG. 3) at the position of the column main body displacement of 400 mm. No breakage occurred at the joint part. The displacement could only be measured up to 400 mm for the convenience of the experimental apparatus.

(Consideration of experimental results: Fig. 5)
As is apparent from FIG. 5, when the bolt pitch of the two road anchor bolts Bo2 is substantially equal to the bolt pitch of the two anti-road anchor bolts Bo1 (arrangement pattern A), the displacement amount of the column main body is 350 mm. It can be seen that the joint portion between the base plate 2 and the column main body 3 has been broken up to now.

  That is, when the bolt pitch of the two road side anchor bolts Bo2 is wide, the joint portion between the base plate 2 and the column main body 3 is broken until the displacement amount of the column main body is 350 mm. The breakage is caused by the base plate 2 being deformed about a virtual folding line Li2 (see FIG. 6 described later) as an axis, and thereby being broken from the joint portion between the base plate 2 and the column main body 3.

  On the other hand, when the bolt pitch of the two road-side anchor bolts Bo2 is narrower than the bolt pitch of the two anti-road-side anchor bolts Bo1 (arrangement patterns B and C), the base plate 2 can be displaced by 350 mm. It can be seen that no breakage occurred at the joint between the main body 3 and the column body 3.

  That is, when the bolt pitch of the two road-side anchor bolts Bo2 is narrower than the bolt pitch of the two anti-road-side anchor bolts Bo1, the displacement amount of the column main body is 350 mm due to the presence of the two road-side anchor bolts Bo2. Thus, the floating amount of the base plate 2 is kept small, and the breakage from the joint portion between the base plate 2 and the column main body 3 is suppressed.

[1-4. Placement of road side anchor bolts]
Next, the arrangement of the two road-side anchor bolts Bo2 of this embodiment will be described in detail based on the above experimental results. In the present embodiment, the two road side anchor bolts Bo2 are arranged at the bending suppression position SP. For this reason, through holes 21a and 21b (see FIG. 1B) through which the two road-side anchor bolts Bo2 pass are also formed at the bending suppression position SP.

  FIG. 6A to FIG. 6C are schematic diagrams for explaining the bending suppression position where the road-side anchor bolt according to this embodiment is arranged.

  As described above, when the bolt pitch of the two road-side anchor bolts Bo2 is wide, the base plate 2 is deformed, and the joint portion between the base plate 2 and the column main body 3 is broken.

  For example, if the thickness of the base plate is increased, the deformation of the base plate can be suppressed. However, the cost increases and the weight also increases. Therefore, there is a method of reducing the thickness of the base plate 2 in order to reduce the cost of the base plate 2 and reduce the weight. However, when the plate thickness of the base plate 2 is thin, the front surface of the base plate 2 is pulled and deformed into a “<” shape due to the impact force applied to the column main body 3.

  That is, when the base plate 3 is deformed excessively, the tensile load is concentrated on the joint portion between the base plate 2 and the column main body 3 and is broken at the “<”-shaped tip. When the bonded portion breaks, the amount of shock energy absorbed is significantly reduced.

  Therefore, in the present embodiment, by arranging the two road side anchor bolts Bo2 at the bending suppression position SP, the deformation of the base plate 2 is reduced, and the breakage from the joint portion between the base plate 2 and the column main body 3 is suppressed. doing.

  Specifically, as shown in FIG. 6 (a), from the above-described experimental results, approximately 45 in the lane direction of the road (in the direction of arrow Ld in FIGS. As shown in FIGS. 6B and 6C, a position that is narrower than the bolt pitch of the two anti-road-side anchor bolts Bo1 is determined from the above experimental results, as shown in FIGS. 6B and 6C. And

  Specifically, as shown in FIG. 6B, a line that passes through the central portion Wo of the base plate 2 in the width direction W and is substantially orthogonal to the lane direction Ld of the road is defined as a virtual folding line Li2. Then, between the two area defining lines Li3 passing over the two anti-road anchor bolts Bo1 and substantially parallel to the virtual folding line Li2, the lane direction of the road from the center O of the column body 3 A position included in a range of approximately 45 degrees in Ld is defined as a bending suppression position SP. The width direction W in the base plate 2 is a direction located substantially parallel to the road lane direction Ld.

  That is, between the two area defining lines Li3 that pass over the two anti-road anchor bolts Bo1 and are substantially parallel to the virtual folding line Li2, from the center O of the column body 3 to the lane direction Ld of the road Two road side anchor bolts Bo2 are arranged at positions included in a range of approximately 45 degrees.

  Thus, by arranging the two road side anchor bolts Bo2 at the bending suppression position SP, the bolt pitch of the two road side anchor bolts Bo2 is larger than the bolt pitch of the two anti-road side anchor bolts Bo1. As with the arrangement pattern B (see FIG. 4B), the deformation of the base plate 2 with the virtual folding line Li2 as an axis can be suppressed.

  Further, as shown in FIG. 6C, a line passing through the central portion Wo of the base plate 2 in the width direction W and substantially perpendicular to the lane direction Ld of the road is defined as a virtual folding line Li2 as in FIG. To do. And it passes between the outer surface of the support | pillar main body 3 in the surface of the baseplate 2, and is between two area | region prescription | regulation lines Li4 which become substantially parallel to the said virtual folding line Li2, Comprising: The lane direction of a road from the center O of the support | pillar main body 3 A position included in a range of approximately 45 degrees in Ld may be used as the bending suppression position SP.

  That is, it passes between the outer surface of the column main body 3 on the surface of the base plate 2 and is between two area defining lines Li4 substantially parallel to the virtual folding line Li2, and from the center O of the column main body 3 to the lane direction Ld of the road Two road side anchor bolts Bo2 are arranged at positions included in a range of approximately 45 degrees.

  Thus, by arranging the two road side anchor bolts Bo2 at the bending suppression position SP, the bolt pitch of the two road side anchor bolts Bo2 is larger than the bolt pitch of the two anti-road side anchor bolts Bo1. As with the arrangement pattern C (see FIG. 4C), the deformation of the base plate 2 with the virtual folding line Li2 as an axis can be further suppressed.

  Note that the through holes 21a and 21b through which the two road-side anchor bolts Bo2 pass are also formed at the bending suppression position SP. That is, between the two area defining lines Li3 that pass over the two anti-road anchor bolts Bo1 and are substantially parallel to the virtual folding line Li2, from the center O of the column body 3 to the lane direction Ld of the road The through holes 21a and 21b are formed at positions included in a range of approximately 45 degrees.

  Further, between the two area defining lines Li4 that pass through the outer surface of the column main body 3 on the surface of the base plate 2 and are substantially parallel to the virtual folding line Li2, from the center O of the column main body 3 to the lane direction Ld of the road The through holes 21a and 21b may be formed at positions included in a range of approximately 45 degrees.

  In this way, by controlling the bolt pitch of the road side anchor bolts for fixing the base plate 2 to suppress the deformation of the base plate 2, it is possible to prevent the welded portion between the column main body 3 and the base plate 2 from being broken. Absorbs impact force caused by collision.

[1-5. Effects of this embodiment]
Thus, the guard fence support 1 according to the embodiment of the present invention includes a base plate 2 fixed to the foundation (attachment target G), and a closed cross-section hollow support body standing and joined on the base plate 2 The base plate 2 is fixed to the foundation by a fixing member Bo with the lane direction Ld of the road as the width direction W, and passes through the central portion Wo of the base plate 2 in the width direction W. When the line substantially perpendicular to the lane direction Ld of the road is the virtual folding line Li2, the fixing member is pivoted on the virtual folding line Li2 in the base plate 2 when the column body 3 receives a load via the cross beam member B. It arrange | positions in the bending suppression position SP which suppresses bending.

  Moreover, the guard fence post 1 according to the embodiment of the present invention has a fixing member (road anchor bolt Bo2) arranged on the road side of the base plate 2 and an anti-road side fixing member (anti-road side) on the anti-road side. Anchor bolts Bo1) are arranged, and two anti-road-side fixing members that are separated in the lane direction Ld of the road are arranged as anti-road-side fixing members. Between the two area defining lines Li3 that pass on the side fixing member and are substantially parallel to the virtual folding line Li2, and included in the range of about 45 degrees from the center O of the column body 3 to the lane direction Ld of the road It is a position.

  Further, in the protective fence column according to the embodiment of the present invention, the bending suppression position SP passes through the outer surface of the column body 3 on the surface of the base plate 2 and is two region defining lines Li4 that are substantially parallel to the virtual folding line Li2. Between the center O of the column body 3 and the lane direction Ld of the road.

  In addition, the guard fence post 1 according to the embodiment of the present invention is provided with a reinforcing plate in the vicinity of the joint portion (joint portion X) between the base plate 2 and the pillar body 3 inside the pillar body 3.

  According to the protective fence column 1 according to the embodiment of the present invention, when the line that passes through the central portion Wo of the base plate 2 in the width direction W and is substantially orthogonal to the lane direction Ld of the road is the virtual folding line Li2, The bending of the base plate 2 is suppressed by disposing the fixing member (the road side anchor bolt Bo2) at the bending suppression position SP that suppresses the bending with the folding line Li2 as an axis.

  In other words, by suppressing the bending of the base plate 2, the breakage of the welded portion (joint X) between the column main body 3 and the base plate 2 is suppressed, and the protective fence column 1 that improves the supporting force and prevents corrosion is provided. Can be provided.

  Moreover, according to the protective fence support | pillar 1 which concerns on embodiment of this invention, on the two anti-road side fixing members (anti-road side anchor bolt Bo1) spaced apart in the lane direction Ld of a road as bending suppression position SP. A fixing member that passes between two area defining lines Li3 that pass through and is substantially parallel to the virtual folding line Li2 and that is included in a range of approximately 45 degrees from the center O of the column main body 3 in the lane direction Ld of the road. The bending of the base plate 2 is suppressed by arranging the (road-side anchor bolt Bo2). For this reason, the fracture | rupture of the welding part (joint part X) of the support | pillar main body 3 and the baseplate 2 can be suppressed more.

  Furthermore, according to the protective fence column 1 according to the embodiment of the present invention, the two regions that pass through the outer surface of the column body 3 on the surface of the base plate 2 and are substantially parallel to the virtual folding line Li2 as the bending suppression position SP. The fixing member (road anchor bolt Bo2) is folded by placing the fixing member (road side anchor bolt Bo2) at a position between the reference line Li4 and within a range of about 45 degrees from the center O of the column body 3 to the road lane direction Ld. Suppress the song. For this reason, the fracture | rupture of the welding part (joint part X) of the support | pillar main body 3 and the baseplate 2 can be suppressed more.

  Moreover, according to the guard fence post 1 according to the embodiment of the present invention, since the reinforcing material (reinforcing plate 31) is provided inside the support body 3, the welded portion between the support body 3 and the base plate 2 ( It is possible to prevent breakage of the joint portion X and improve the supporting force and prevent corrosion.

  Furthermore, according to the guard fence post 1 according to the embodiment of the present invention, bending is suppressed by narrowing the bolt pitch of the two road side anchor bolts Bo2. For this reason, the base plate 2 is not enlarged by narrowing the bolt pitch of the two road side anchor bolts Bo1, and the manufacturing cost of the base plate 2 can be reduced.

  As mentioned above, although demonstrated based on embodiment of the protection fence support | pillar 1 illustration of this invention, this invention is not limited to this, The structure of each part is replaced with the thing of the arbitrary structures which have the same function. Can do.

  For example, in the embodiment of the present invention, the cylindrical column main body 3 is shown as an example of a column main body having a closed cross-section, but the column main body 3 is not limited to this, and the column main body 3 is formed by a rectangular column or other polygonal column shape. It is also possible to do. For example, in the case of a quadrangular prism, a mode in which one reinforcing plate 31 is provided in the central portion is normal, but in order to increase rigidity and load distribution, two or more reinforcing plates 31 are equally spaced. It is also possible to provide it. The strut body 3 is not limited to a steel pipe but may be a metal pipe such as an aluminum pipe.

  Moreover, although embodiment of this invention demonstrated the case where two road side anchor bolt Bo2 is arrange | positioned in bending suppression position SP, it is not limited to this. For example, one road-side anchor bolt Bo1 may be disposed at the bending control position SP at approximately the center of the bending control position SP. However, in order to further improve the support force when the column body 3 receives a load. Alternatively, two or more (for example, three) road-side anchor bolts Bo2 may be arranged.

  Furthermore, in the embodiment of the present invention, the case of the anchor bolt as the fixing member has been described, but the present invention is not limited to this. That is, the base plate 2 can be appropriately changed to another member for fixing the base plate 2 to the foundation (attachment target G).

  As mentioned above, even if it replaces with the thing of arbitrary composition which has the same function, the same operation effect as protection fence support 1 concerning the embodiment of the present invention can be obtained.

DESCRIPTION OF SYMBOLS 1 Guard fence post 2 Base plate 21 Through hole 3 Post body 31 Reinforcement plate 32 Rigid holding part 33 Load distribution part 34b Weak part B1, B2 Cross beam member Bo Anchor bolt Bo1 Anti-road side anchor bolt Bo2 Road side anchor bolt C Computer D Data logger G Mounting target J Hydraulic jack K Mounting base M Displacement meter N Buckling point P Reaction force strut R Load cell S Strut holding member SP Bending suppression position X Joint

Claims (3)

A protective fence column comprising a base plate fixed to a foundation, and a closed column hollow column body standing and joined on the base plate,
The base plate is fixed to the foundation by a fixing member with the lane direction of the road as a width direction,
When a line that passes through the central portion in the width direction of the base plate and is substantially perpendicular to the lane direction of the road is a virtual folding line, the fixing member receives the load when the column main body receives a load via a cross beam member. It is arranged at a bending suppression position that suppresses bending with the virtual folding line as an axis in the base plate ,
In the inside of the column main body, a reinforcing plate is provided in the vicinity of the joint portion between the base plate and the column main body along a load direction applied to the column main body,
The reinforcing plate has a rigid holding portion that is a substantially rectangular portion formed below the reinforcing plate, and a height of the reinforcing plate that is formed above the rigid holding portion and that faces the load direction of the reinforcing plate extends. A protective fence post characterized by being formed from a load distribution portion that is a substantially triangular portion . The anti-road side fixing member is arranged on the road side in the base plate, the anti-road side fixing member is arranged on the anti-road side, and the two anti-roads separated as the anti-road side fixing member in the lane direction of the road Side fixing members are arranged,
The bending suppression position is between two area defining lines that pass over the two anti-road-side fixing members and are substantially parallel to the virtual folding line, and the road from the center of the column main body to the road The guard fence post according to claim 1, which is a position included in a range of approximately 45 degrees in the lane direction.   The bending suppression position is between two region defining lines that pass through the outer surface of the column main body on the surface of the base plate and is substantially parallel to the virtual folding curve, and from the center of the column main body to the road. The protective fence column according to claim 1 or 2, wherein the protective fence column is located within a range of approximately 45 degrees in the lane direction.