JP2013147797A - Guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guard fence which can be installed on the metallic ground covering section of a road with easy work and strongly fixed thereto without the need for applying work to the ground covering section and using special connection members.SOLUTION: The guard fence which has an upper lateral beam 4a, a lower lateral beam 4b, an upper bottom rail 4c and a lower bottom rail 4d mounted as horizontal rails between columns 3 erected on a metallic ground covering section 2 installed at the side edge of a road, comprises: reinforcing plates 20 to be welded and fixed to the metallic ground covering section 2; base plates 11 integrally formed at the lower ends of the columns 3; connection bolts 30 for connecting the reinforcing plates 20 to the base plates 11; and connection nuts 31 to be screw-joined to the connection bolts 30.

Description

  The present invention relates to a protective fence installed on a ground cover of a road.

  Conventionally, on bridges and mountain roads, in order to prevent traffic vehicles from falling, horizontal rails have been installed between columns that are erected on the concrete ground cover provided on the edge of the road. Guard fence is used. Further, in particular, in bridges, for example, a steel metal ground cover is employed in order to reduce the load acting on the main girder and shorten the construction period.

  For example, the ground cover is formed of a metal ground cover inner side forming plate, a ground cover ceiling wall forming plate, and a decorative cover plate, and the base (base portion) of the column and the column mounting frame are grounded. A structure that is fixed by a fixing bolt via a cover ceiling wall forming plate is known (for example, see Patent Document 1).

  In addition, on existing roads, it is pointed out that there is a shortage of width as the size of passing vehicles increases and traffic increases. As means for solving this problem, an existing concrete ground cover is cut and removed, and a width expanding material having a steel hollow cylinder is installed to expand the width. The protective fence is installed on the ground cover formed by the width expanding material that expands the width in this way (see, for example, Patent Document 2).

JP-A-8-13422 (paragraphs 0021, 0032, FIG. 3, FIG. 4, FIG. 6) Japanese Patent No. 3770874 (Claims, FIG. 3)

  However, in order to install the protective fence on the metal ground cover described in Patent Documents 1 and 2, the base part for standingly fixing the support fence post using the anchor bolt like the concrete ground cover And the ground cover part cannot be connected, a dedicated member for connecting the base part and the ground cover part is required, and there is a concern that installation work is troublesome.

  The present invention has been made in view of the above circumstances, and does not require processing of the ground cover part, and without using a dedicated connecting member, can be easily installed on the metal ground cover part of the road. It is an object of the present invention to provide a protective fence that can be fixed firmly.

  In order to solve the above-mentioned problems, the present invention is a protective fence in which a horizontal beam is installed between columns that are erected on a metal ground covering portion that is installed on a side edge of a road. A reinforcing plate fixed to the ground cover portion by welding, a base plate formed integrally or integrally with a lower end of the support column, and a connecting member that connects the reinforcing plate and the base plate. .

  By configuring in this way, the reinforcing plate fixed to the ground cover portion by welding and the base plate formed integrally or integrally with the lower end of the support column are connected by the connecting member without processing the ground cover portion. can do.

  In the present invention, the connecting member is connected to a connecting bolt that is screw-coupled to a screw hole provided in the reinforcing plate through a through-hole provided in the base plate, and a screw portion that protrudes on the base plate of the connecting bolt. It is good to comprise with the connection nut which carries out screw connection.

  By comprising in this way, it was installed in the base plate in a state where the connection bolt was screwed to the screw hole provided in the reinforcement plate by tapping, and the reinforcement plate was fixed to the ground cover by welding. The reinforcing plate and the base plate can be connected by inserting the connecting bolt into the through hole and screwing the connecting nut to the threaded portion of the connecting bolt protruding on the base plate.

  In the present invention, the connecting member is screwed into a connecting screw hole having an enlarged stepped portion at a lower end opening provided in the reinforcing plate, and a head is accommodated in the enlarged diameter stepped portion. It is good to comprise with a volt | bolt and the connection nut screw-coupled to the thread part of the said connection bolt which penetrates the through-hole provided in the said base plate, and protrudes on the said base plate. In this case, the diameter-expanded step portion of the connection screw hole provided in the reinforcing plate is formed in a diameter-expanded taper shape, and the head of the connection bolt is engaged with the diameter-expanded taper-shaped diameter-expanded step portion It is good to form.

  With this configuration, a through-hole provided in the base plate in a state where the connection bolt is screw-connected to the connection screw hole provided in the reinforcing plate and the reinforcing plate is fixed to the ground cover by welding. The reinforcing plate and the base plate can be connected to each other by inserting the connecting bolt and connecting the connecting nut to the threaded portion of the connecting bolt protruding on the base plate.

  In this case, the enlarged diameter step portion of the through hole provided in the reinforcing plate is formed in an enlarged taper shape, and the head portion of the connecting bolt is formed in a dish shape that engages with the enlarged diameter tapered step portion. Thus, the reinforcing plate and the connecting bolt can be brought into close contact with each other, and the lower surface of the reinforcing plate can be made flat. Thereby, the lower surface of a reinforcement plate and the upper surface of a ground cover part can be welded closely.

  Without processing the ground cover part, the reinforcing plate fixed to the ground cover part by welding and the base plate formed integrally or integrally with the lower end of the support can be connected by the connecting member, Without using a connecting member, it is possible to facilitate the installation work on the metal ground cover portion of the road and to firmly fix it.

It is a schematic front view which shows the installation state of 1st Embodiment of the protection fence which concerns on this invention. It is a front view which shows the principal part of the installation state of the protection fence of 1st Embodiment. It is sectional drawing which follows the II line | wire of FIG. It is an expanded sectional view which follows the II-II line of FIG. It is a principal part enlarged front view which shows a part of installation part in a cross section. It is a principal part expanded side view which shows a part of state before installation of the protection fence of 1st Embodiment in a cross section. It is a principal part expanded side view which shows a part of installation part in a cross section. It is a schematic front view which shows the installation state of 2nd Embodiment of the protection fence which concerns on this invention. It is a front view which shows the principal part of the installation state of the protection fence of 2nd Embodiment. It is sectional drawing which follows the III-III line of FIG. It is an expanded sectional view which follows the IV-IV line of FIG. It is a principal part enlarged side view which shows a part of state before installation of the protection fence of 2nd Embodiment in a cross section. It is a principal part expanded side view which shows a part of installation part in a cross section. It is a principal part expanded side view which shows a part of another installation part in 2nd Embodiment in a cross section.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail based on an accompanying drawing.

<First Embodiment>
As shown in FIG. 1 to FIG. 7, the protective fence F according to the first embodiment is a plurality of standing upright at appropriate intervals on a metal cover 2 made of metal, for example, steel, provided on the side edge of the road 1. The main column 3 and a plurality of, for example, four horizontal rails 4a to 4d constructed between the adjacent columns 3 are mainly configured.

  The protective fence F configured as described above includes a connecting bolt that is a connecting member that includes a reinforcing plate 20 that is fixed to the ground cover portion 2 by welding W and a base plate 11 of the base portion 10 that fixes the column 3 upright. 30 and a connecting nut 31.

  As shown in FIG. 4, the support column 3 is formed of a substantially oval aluminum hollow extruded shape in which the road side bulges. In this case, an upper bracket 5a made of cast aluminum is attached to the upper end opening of the support column 3, and an upper horizontal beam 4a, which is a horizontal beam, is installed via the upper bracket 5a. In this case, the upper cross beam 4a is formed of an extruded aluminum member having a substantially hollow elliptical cross section, and an aluminum upper connecting sleeve 6a is inserted and fixed in the hollow portion, and the upper bracket 5a and the upper cross beam 4a are connected. The upper transverse beam 4a is constructed by screwing the mounting bolt 8 penetrating to the upper connecting sleeve 6a.

  In addition, a lower horizontal beam 4 b that is a horizontal rail is installed on the road side of the middle portion of the column 3. In this case, the lower cross beam 4b is formed of an extruded aluminum member having a substantially hollow elliptical cross section, and an aluminum lower connecting sleeve 6b is inserted and fixed in the hollow portion and penetrates the support column 3 and the lower cross beam 4b. The lower cross beam 4b is constructed by screwing the mounting bolt 8 to be connected to the lower connecting sleeve 6b.

  Further, upper and lower bottom brackets 6c and 6d project from the upper side and the lower side of the opposing side surfaces of the adjacent support columns 3, respectively, and a cross-sectionally flat inverted U-shape is provided between the opposing upper and lower bottom brackets 6c and 6d. An upper bottom rail 4c and a lower bottom rail 4d are installed. A ballast 7 is provided between the upper bottom rail 4c and the lower bottom rail 4d positioned above and below at an appropriate interval along the longitudinal direction of the fence. The upper bottom rail 4c, the lower bottom rail 4d, and the ballast 7 are formed of an extruded aluminum material.

  The base portion 10 is a cast aluminum member comprising a base post 12 having a recess 12a having a substantially elliptical cross section that can hold the column 3 and a base plate 11 extending from the bottom of the base post 12 in all directions. Is formed. In this case, as shown in FIG. 4, the base plate 11 is formed in a substantially pentagonal shape in which the central portion of the side on the road side gently protrudes and the side opposite to the road side forms a trapezoid.

  The lower end portion of the column 3 is inserted into the recess 12a of the base post 12 of the base unit 10 formed in this way, and the side wall opposite to the road side of the base post 12 and the mounting holes provided in the column 3 (see FIG. The support column 3 is erected and fixed to the base portion 10 by screwing a mounting nut 14 to a screw portion projecting into the support column of the mounting bolt 13 that passes through (not shown). Further, through holes 15 are provided in a total of four locations, two on the road side of the base plate 11 of the base portion 10 and two on the left and right sides on the opposite side of the road side.

  On the other hand, the reinforcing plate is formed in a rectangular shape with a steel material subjected to galvanizing treatment, and is fixed by welding W while being placed on the upper surface of the ground covering portion 2. Also, screw holes 21 are provided at four locations corresponding to the through holes 15 provided in the base plate 11 in the reinforcing plate 20, for example, by tapping.

  A connecting member for connecting the reinforcing plate 20 formed as described above and the base plate 11 of the base portion 10 for standingly fixing the support column 3 is provided on the reinforcing plate 20 as shown in FIGS. The connecting bolt 30 is screwed to the screw hole 21 and the connecting nut 31 is screwed to the threaded portion 30a of the connecting bolt 30 that passes through the through hole 15 provided in the base plate 11 and protrudes on the base plate 11. Yes. In this case, the connecting bolt 30 is fixed to the opening end side of the screw hole 21 of the base plate 20 by welding W1. A washer 32 is interposed between the connecting nut 31 and the base plate 11. The through hole 15 provided in the base plate 11 has an inner diameter larger than the diameter of the connecting bolt 30, and an insulating bush 16 made of, for example, vinyl chloride, into which the connecting bolt 30 can be inserted into the inner periphery of the through hole 15. Is attached. Thus, by interposing the vinyl chloride insulating bush 16 between the through hole 15 and the connecting bolt 30, corrosion due to metal contact between the aluminum base plate 11 and the steel reinforcing plate 20 can be prevented. In addition, it is possible to prevent rainwater from entering the connecting portion.

  Next, the installation procedure of the protective fence F of 1st Embodiment is demonstrated. First, in a factory or the like, the lower end portion of the support column 3 is inserted into the recess 12 a of the base post 12 of the base unit 10 in advance, and the support column 3 is fixed upright by the mounting bolt 13 and the mounting nut 14. Further, the connecting bolt 30 is screwed to the screw hole 21 provided in the reinforcing plate 20, and the connecting bolt 30 is erected and fixed to the reinforcing plate 20. In this case, the connecting bolt 30 and the open end side of the screw hole 21 of the base plate 20 are fixed by welding W1.

  Next, the reinforcing plate 20 on which the connecting bolt 30 is erected is fixed to the ground covering portion 2 by welding W (see FIG. 6). In this state, the connecting bolt 30 is inserted into the through hole 15 provided in the base plate 11 of the base portion 10, and the connecting nut 31 is screwed to the screw portion 30 a of the connecting bolt 30 protruding on the base plate 11 via the washer 32. Then, the reinforcing plate 20 and the base portion 10 are fixed to the ground covering portion 2. After that, the horizontal rails 4a to 4d are installed between the columns 3 that are erected and fixed on the ground cover, and the ballast 7 is assembled to install the protective fence F.

  According to the guard fence F of the first embodiment configured as described above, the connecting bolt 30 is screwed to the screw hole 21 provided in the reinforcing plate 20 by tapping, and the reinforcing plate 20 is welded. After fixing to the ground covering portion 2 by W, the connecting bolt 30 is inserted into the through hole 15 provided in the base plate 11, and the connecting nut 31 is screwed to the screw portion 30 a of the connecting bolt 30 protruding on the base plate 11. Thus, the reinforcing plate 20 and the base plate 11 can be connected.

  Therefore, it is possible to facilitate installation work on the metal ground cover portion 2 on the road without processing the ground cover portion 2 and without using a dedicated connecting member, and it can be firmly fixed. .

Second Embodiment
As shown in FIG. 8 to FIG. 13, the protective fence FA of the second embodiment is a plurality of metal fences 2 provided on the side edges of the road 1 that are erected at appropriate intervals on a ground cover portion 2 made of steel. It is mainly composed of a support column 3A and a plurality of, for example, five horizontal rails 4e to 4i installed between adjacent support columns 3A.

  The protective fence FA configured as described above connects a reinforcing plate 20A fixed to the ground covering portion 2 by welding W and a base plate 11A formed integrally with the column 3A to a connecting bolt 30A that is a connecting member. It is connected with the nut 31A.

  As shown in FIGS. 10 and 11, the support column 3 is formed of a cast aluminum member having a thick H-shaped cross section on the road side, the upper end portion 3 a is inclined to the opposite side to the road side, and the upper end portion A step 3b is provided on the road side of the base 3a. A rectangular base plate 11A is integrally formed at the bottom of the support column 3A.

  A top rail 4e, a main top rail 4f, and a lower top rail 4g, which are horizontal rails, are installed on the road side slightly below the upper end portion 3a, the step portion 3b, and the middle portion of the column 3A. In this case, the top rail 4e, the main top rail 4f, and the lower top rail 4g are each formed of an extruded aluminum member having a substantially hollow elliptical cross section. Further, in the hollow portions of the top rail 4e, the main top rail 4f, and the lower top rail 4g, an aluminum upper sleeve 6e, a main connecting sleeve 6f, and a lower connecting sleeve 6g are inserted and fixed, respectively, and the column 3A and the top rail 4e, the main top rail 4f, and the lower top rail 4g are screwed to the upper sleeve 6e, the main connection sleeve 6f and the lower connection sleeve 6g by screwing the mounting bolts 8 therethrough, so that the top rail 4e, the main top rail 4f and the lower top rail A rail 4g is installed.

  Further, upper and lower bottom brackets 6h and 6i project from the upper side and the lower side of the opposite side surfaces of the adjacent support column 3A, respectively, and the cross-section is flat inverted U-shaped between the upper and lower bottom brackets 6h and 6i facing each other. The upper bottom rail 4h and the lower bottom rail 4i are constructed. In addition, a ballast 7 is erected between the upper bottom rail 4h and the lower bottom rail 4i positioned above and below at an appropriate interval along the longitudinal direction of the fence. In addition, the upper bottom rail 4h, the lower bottom rail 4i, and the ballast 7 are formed of an aluminum extruded shape.

  The base plate 11A formed integrally with the bottom of the column 3A is formed in a rectangular shape as shown in FIGS. 11 to 13, and has two left and right locations on the road side and two left and right locations on the opposite side of the road side. In a total of four places, long hole-like through holes 15A are provided along the front-rear direction with respect to the road side. In this case, the through hole 15A may be either a straight long hole or an inclined long hole along the front-rear direction with respect to the road side.

  On the other hand, the reinforcing plate 20 </ b> A is formed in a rectangular shape with a steel material that has been subjected to galvanization, and is fixed by welding W while being placed on the upper surface of the ground covering portion 2. In addition, at four positions corresponding to the through holes 15A provided in the base plate 11A in the reinforcing plate 20A, through holes 23 having, for example, an enlarged stepped portion 22 having an enlarged diameter tapered shape are provided at the lower end opening.

  As shown in FIGS. 12 and 13, the connecting member for connecting the reinforcing plate 20A formed as described above and the base plate 11A integrally formed on the bottom of the support column 3A has an enlarged diameter provided on the reinforcing plate 20A. The flat bolt 30A having a countersunk head 33 which is a connecting bolt screwed to the connecting screw hole 23 and is engaged with the tapered diameter-expanded stepped portion 22 and protrudes on the base plate 11A of the flat bolt 30A. The connecting nut 31A is screwed to the threaded portion 30a via a washer 32. In this case, the countersunk head portion 33 and the connecting screw hole 23 of the countersunk bolt 30A may be fixed by welding W1.

  Next, the installation procedure of the protective fence FA of 2nd Embodiment is demonstrated. First, in a factory or the like, the countersunk bolt 30A is screwed to the connecting screw hole 23 provided in the reinforcing plate 20A in advance, and the connecting bolt 30A is erected and fixed to the reinforcing plate 20A. In this case, the countersunk head 33 of the countersunk bolt 30A is engaged (accommodated) in the enlarged diameter step 32, and the countersunk head 33 of the countersunk bolt 30A and the connecting screw hole 23 are fixed by welding W1. Good.

  Next, the reinforcing plate 20A, on which the connecting bolt 30A is erected and fixed, is fixed on the ground cover 2 by welding (see FIG. 12). In this state, the connecting bolt 30A is inserted into the through hole 15A provided in the base plate 11A of the base portion 10 for standingly fixing the column 3A, and the screw portion 30a of the connecting bolt 30A protruding on the base plate 11A is interposed via the washer 32. Then, the connecting nut 31 </ b> A is screwed to fix the reinforcing plate 20 </ b> A and the base portion 10 to the ground covering portion 2. Thereafter, rails 4e to 4i, which are horizontal rails, are installed between the columns 3A that are erected and fixed to the ground cover 2, and the ballast 7 is assembled to install the protective fence FA.

  An insulating bush (not shown) may be interposed in the gap between the through hole 15A provided in the base plate 11A and the countersunk bolt 30A, as in the first embodiment. Thus, by interposing the insulating bush in the gap between the through hole 15A and the countersunk bolt 30A, corrosion due to metal contact between the aluminum base plate 11A and the steel reinforcing plate 20A can be prevented, and the connecting portion Can prevent rainwater from entering.

  According to the protection fence FA of the second embodiment configured as described above, the connecting screw hole 23 having the diameter-expanding tapered diameter-expanding step portion 22 provided in the reinforcing plate 20A has the dish-shaped head 33. The flat bolt 30A is screwed and fixed upright, and the reinforcing plate 20A is fixed to the ground cover portion 2 by welding W. Then, the connecting bolt 30A is inserted into the through hole 15A provided in the base plate 11A, and the protruding portion is inserted. The reinforcing plate 20A and the base plate 11A can be connected by screwing the connecting nut 31A to the provided screw portion 30a via the washer 32.

  Therefore, it is possible to facilitate installation work on the metal ground cover portion 2 on the road without processing the ground cover portion 2 and without using a dedicated connecting member, and it can be firmly fixed. .

  In this case, the enlarged diameter step portion 22 of the through hole 23 provided in the reinforcing plate 20A is formed in an enlarged taper shape, and the countersunk head portion 33 of the countersunk bolt 30A is engaged with the enlarged diameter step portion 22 having an enlarged diameter taper. By combining, the reinforcing plate 20A and the countersunk bolt 30A can be brought into close contact with each other, and the lower surface of the reinforcing plate 20A can be made flat, so that the lower surface of the reinforcing plate 20A and the upper surface of the ground covering portion 2 are connected. Can be welded closely.

  In the above description, the case where the connecting bolt is formed by the countersunk bolt 30A and the enlarged diameter stepped portion 22 provided on the reinforcing plate 20A is formed in an enlarged diameter tapered shape has been described. It is good also as another structure.

  For example, as shown in FIG. 14, the connecting bolt is formed by a hexagonal bolt 30B having a hexagonal head 34, and the enlarged diameter stepped portion of the through hole 23 provided in the reinforcing plate 20A is a hexagonal enlarged diameter stepped portion. It may be formed by 22B, and the head 34 of the hexagon bolt 30B may be engaged (accommodated) in the enlarged diameter step portion 22B. In this case, a hexagonal hole 34 a may be provided at the top of the head 34. By providing the hexagonal hole 34a at the top of the head 34 in this way, the coupling nut 31A can be firmly screwed to the hexagonal bolt 30B in a state where a tool such as a hexagonal wrench is inserted and fixed in the hexagonal hole 34a. it can.

F, FA Protective fence W Welding 1 Road 2 Ground cover 3, 3A Post 4a Upper cross beam (horizontal beam)
4b Lower horizontal beam (horizontal beam)
4c Upper bottom rail (horizontal rail)
4d Lower bottom rail (horizontal rail)
4e Top rail (horizontal rail)
4f Main top rail (cross rail)
4g Lower top rail (horizontal rail)
4h Upper bottom rail (horizontal rail)
4i Lower bottom rail (horizontal rail)
DESCRIPTION OF SYMBOLS 10 Base part 11, 11A Base plate 12 Base post 15, 15A Through-hole 20, 20A Reinforcement plate 21 Screw hole 22 Tapered diameter expansion step part 22B Hexagonal diameter expansion step part 23 Connection screw hole 30 Connection bolt 30A Countersunk bolt (connection bolt )
30B Hexagon bolt (connection bolt)
31, 31A Connecting nut 33 Dish head 34 Hex head

Claims (4)

A protective fence in which a horizontal beam is erected between pillars erected on a metal ground cover installed on the side edge of the road,
A reinforcing plate fixed to the metal ground cover by welding;
A base plate integrally or integrally formed with the lower end of the support;
A protective fence comprising a connecting member for connecting the reinforcing plate and the base plate. The protective fence according to claim 1,
The connecting member is screwed to a connecting bolt that is screwed to a screw hole provided in the reinforcing plate via a through hole provided in the base plate, and is connected to a screw portion protruding on the base plate of the connecting bolt. A protective fence consisting of nuts. The protective fence according to claim 1,
The connecting member is screwed into a connecting screw hole having an enlarged stepped portion at a lower end opening provided in the reinforcing plate, and a head is accommodated in the enlarged diameter stepped portion, and a connecting bolt and a base plate A protective fence comprising a connecting nut that passes through a provided through-hole and is screwed to a threaded portion of the connecting bolt protruding on the base plate. In the protective fence according to claim 3,
An enlarged diameter step portion of the through hole provided in the reinforcing plate is formed in an enlarged taper shape, and a head portion of the connecting bolt is formed in a dish shape that engages with the enlarged diameter tapered step portion. A protective fence characterized by that.

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