JP3705069B2 - fence - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fence erected along a road shoulder or a bridge end girder, and more particularly to a fence that can be easily constructed.
[0002]
[Prior art]
Conventionally, fences have been installed on road shoulders and bridge end girders as a safety measure. Of these fences, the main purpose is to prevent the invasion of people, animals, etc., or to prevent the dumping of empty cans, etc. Yes. In addition, the net-like net has an advantage that it has less psychological pressure on the driver and pedestrians than the panel-type net, and is less likely to become a sunshine obstacle in surrounding houses.
[0003]
FIGS. 7A, 7B and 7C are a front view showing a conventional example of a fence using such a net-like net, a view as seen from an arrow A, and a diagram showing a net fixing structure. In the figure, reference numeral 1 is a post erected on a shoulder of a highway or a general road (hereinafter simply referred to as a road) or an end girder of a bridge at an appropriate interval, 2 is a mesh net, 3 is an outer periphery of the mesh net 2 The frame 4 is constructed by these frame units that hold and fix the parts. The frame unit 3 is fixed to the vertical frame 5 and the horizontal frame 6 each having an L-shaped cross-section, and a plurality of bolts 7 on the back side of the vertical frame 5 and the horizontal frame 6, respectively. The L-shaped net fixing member 8 fixes the mesh net 2 to the horizontal frame 6. In addition, L-shaped brackets 9 and 10 are respectively attached to the side surfaces of the support column 1 and the vertical frame 5, and these brackets 9 and 10 are connected and fixed to each other by bolts 11 and nuts 12 to thereby fix the frame unit 3. Is fixed to the column 1.
[0004]
FIG. 8 is a cross-sectional view of an essential part showing another conventional mounting structure for a mesh net.
In the figure, reference numeral 15 denotes a horizontal frame (or top rail) that constitutes a frame together with the vertical frame 16. The horizontal frame 15 has a hollow portion 15A having a substantially hollow cross-sectional shape and an open bottom center portion, and the hollow portion 15A. A pair of net gripping pieces 15B, 15B vertically suspended from each opening edge of the lower surface of the base plate, and an upper end portion of the net-like net 2 together with the spacer 17 is inserted between the net gripping pieces 15B. 19, the mesh net 2, the net holding piece 15B, the vertical frame 16 and the spacer 17 are fastened together.
[0005]
[Problems to be solved by the invention]
However, both of the conventional fences shown in FIGS. 7 and 8 have a problem of lack of workability when tightening the bolts 11 and 18. That is, in the fence 4 shown in FIG. 7, the surfaces parallel to the roadway of the brackets 8 and 9 are in close contact with each other and fixed by the bolts 11 and the nuts 12, so that the nuts 12 are located on the road shoulder side. For this reason, when the bolt 11 is tightened, in order to prevent the nut 12 from rotating, when the upper end side of the fence 4 is fixed, an operator rides on a stepladder as necessary to place the body from the fence 4 on the shoulder side. Needed to embark on or set footing on the shoulder side. On the other hand, when the lower end side of the fence 4 is fixed, it is necessary to provide a scaffold, apart from a large gap where a spanner can be inserted below the fence 4. Furthermore, it is necessary for two workers to work together inside and outside the fence.
[0006]
Also in the conventional fence shown in FIG. 8, it takes time to insert the spacer, and the frame members 15 and 16 are wavy in the bolt tightening portion, and the appearance is not good.
[0007]
Further, it takes time to remove any fence after it has been installed once or to replace the mesh net 2 with another net due to damage or the like.
[0008]
The present invention has been made to solve the above-described conventional problems. The object of the present invention is to assemble the mesh net easily and easily attach the frame body unit to the support column. The aim is to provide an improved fence.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the first invention includes a mesh net, a frame unit that supports and fixes the outer peripheral portion of the mesh net, and a connecting member that supports the frame unit and connects to a support column. A horizontal frame and a vertical frame comprising a hollow portion having a rectangular cross-sectional shape and a net support piece integrally connected to the hollow portion by forming the frame unit by an extruded profile, and the mesh shape A net fixing member that fixes an outer peripheral portion of the net to the net support piece, and a horizontal plate portion that is fixed to the horizontal frame, and a horizontal plate portion that is wider than the horizontal plate portion, thereby forming the horizontal plate. A vertical plate portion having a fixed portion protruding from the roadway side end surface of the plate portion to the roadway side is formed in an L shape, the vertical plate portion is in close contact with a side surface of the column, and the fixed portion is supported by a fastening means. It is fixed to.
[0010]
According to a second invention, in the first invention, the frame unit is provided with reinforcing plates fixed to both surfaces of the joining end portion of the horizontal frame of the vertical frame.
[0011]
In the first invention, the vertical plate portion of the connecting member has a fixing portion that protrudes to the roadway side from the horizontal plate portion, and the fixing portion is fixed to the side surface of the column by the fastening means. It is possible to fix with from the roadway side. As fastening means, bolts and nuts are generally used. The hollow portions of the horizontal frame and the vertical frame increase the strength of the frame unit.
[0012]
In the second invention, the joint between the horizontal frame and the vertical frame is reinforced by the reinforcing plate.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
1 is a cross-sectional view of a fence according to the present invention, FIG. 2 is a front view showing a part of the main part of the fence in a broken state, FIG. 3 is an exploded perspective view of main components of the fence, and FIG. FIG. 5 is a sectional view taken along the line V-V in FIG. 2, and FIG. 6 is a sectional view taken along the line VI-VI in FIG.
[0014]
In these drawings, reference numeral 21 denotes a foundation reinforced by a reinforcing bar provided on the shoulder of a road 22, and a plurality of support columns 23 are erected on the foundation 21 at appropriate intervals. In addition, between the adjacent support columns 23, a mesh net 24 whose outer peripheral portion is fixedly held by the frame unit 25 is installed in two upper and lower stages, and a fence 26 is constructed by these members.
[0015]
The column 23 is formed of an extruded shape member such as an aluminum alloy (for example, A6061S-T6) into a hollow shape having a rectangular cross section, whereby four side plates, that is, a side plate portion 23a on the roadway side and a side plate portion on the road shoulder side. 23b, and two side plate portions 23c orthogonal to these side plate portions 23a, 23b, and a cap 27 is fixed to the upper end opening portion by a plurality of set screws 28, and the lower end portion has two pieces as shown in FIG. It is fixed to a road shoulder side surface (outer surface) 21 a of the foundation 21 by an anchor bolt 29. The column 23 is a square of □ 60 × 60 mm and has a thickness of about 5 mm.
[0016]
In the case of the present embodiment, an example using a lath net made of an aluminum alloy such as A5052P-H34 is shown as the mesh net 24. However, the present invention is not limited to this, and a wire-like wire lath may be used. The point is that it is mesh-shaped and does not significantly impair the surrounding landscape. The mesh net 24 has a length of about 1820 mm and a height of about 890 mm.
[0017]
The frame unit 25 includes a pair of upper and lower horizontal frames 30, a pair of left and right vertical frames 31, a reinforcing plate 32 (32A, 32B) that reinforces a joint between the horizontal frame 30 and the vertical frame 31, and the mesh net. The outer peripheral part of 24 is comprised with the member 33 for net | network fixation which fixes the said horizontal frame 30 and the vertical frame 31 grade | etc.,.
[0018]
The horizontal frame 30 is formed of an aluminum extruded shape such as A6063S-T6, so that a hollow portion 30A having a rectangular cross section as shown in FIGS. 3 and 4 and a roadway side plate portion 30a of the hollow portion 30A. And a net support piece 30B integrally connected to the end, the end is cut at an angle of 45 °, and a bolt 36 for fixing a connecting member 35 to be described later is inserted into the upper surface of the end. A hole 37 is formed in the longitudinal direction of the horizontal frame 30. The long holes 37 are formed by cutting the extruded shape member into a predetermined length to form the horizontal frame 30.
[0019]
The vertical frame 31 has the same cross-sectional shape as the horizontal frame 30 by being formed of an extruded shape such as an aluminum alloy (for example, JIS A6063S-T6). Therefore, the hollow section 31A having a rectangular cross-sectional shape and the net support piece 31B integrally connected to the roadway side plate portion 31a of the hollow section 31A are provided, and the end portions are cut at an angle of 45 °. Further, a notch 38 into which one end portion of the connecting member 35 is inserted is formed in the width direction on the front surface facing the side surface of the column 23 at the end portion. The notch 38 is formed by machining the extruded profile into a vertical frame 31 by cutting it into a predetermined length.
[0020]
The horizontal frame 30 and the vertical frame 31 are aligned so that the net support pieces 30B and 31B form the same plane, the cut ends are abutted, and a plurality of reinforcing plates 32 are provided on both front and back surfaces of the joint end. Are fixed to each other by the blind rivets 40 to form a horizontally long rectangular frame. Then, the mesh net 24 is inserted into the inside of the frame composed of the horizontal frame 30 and the vertical frame 31 integrally connected by the reinforcing plate 32, specifically, the space surrounded by the hollow portions 30A and 31A. Then, the outer peripheral portion is fixed to the inner surfaces of the net support pieces 30B and 31B by the net fixing member 33. The net fixing member 33 is fixed to the net support pieces 30B and 31B by a plurality of set screws 42 and nuts 43, thereby completing the frame unit 25 to which the mesh net 24 is attached. It is attached to the column 23 via the connecting member 35. The frame unit 25 to which such a mesh net 24 is attached is normally assembled at a factory, but can be easily assembled on site. Note that the net fixing member 33 and the net support pieces 30B and 31B may be fixed by a blind rivet or the like for reinforcement.
[0021]
The reinforcing plate 32 is formed in a substantially square shape by a metal plate such as an aluminum alloy (for example, JIS A6063S-T5), and eight reinforcing plate 32 are used for one frame unit 25. In this case, since the net support pieces 30B and 31B are integrally connected to only the side surfaces of the hollow portions 30A and 31A in the horizontal frame 30 and the vertical frame 31, the road plate side and road shoulder side reinforcing plates 32A and 32B Are different in size, and the reinforcing plate 32A on the roadway side is formed larger than the reinforcing plate 32B on the road shoulder side.
[0022]
The net fixing member 33 is formed in an L shape by an extruded shape such as an aluminum alloy (for example, JIS A6063S-T5), and has a length corresponding to the length of the horizontal frame 30 and the vertical frame 31. A total of four are used, two each.
[0023]
The connecting member 35 is formed in an L shape using an aluminum alloy (eg, JIS A6061S-T6) or the like, so that a horizontal plate portion 35A and a vertical plate portion provided perpendicular to one end of the horizontal plate portion 35A are provided. 35B. The horizontal flat plate portion 35 </ b> A is inserted into the horizontal frame 30 through the notch 38 of the vertical frame 31 and is fixed to the inner surface of the horizontal frame 30 by the bolts 36. For this reason, an internal thread 45 into which the bolt 36 is screwed is formed at the longitudinal intermediate portion of the horizontal plate portion 35A.
[0024]
The vertical plate portion 35B is integrally formed with a fixing portion 135 that is wider than the horizontal plate portion 35A and protrudes toward the roadway side from the end surface of the roadway. The fixing portion 135 is a bolt as a fastening means. 47 and the nut 48 are fixed to the side plate portion 23c of the column 23. In this case, since the bolt 47 is attached by penetrating from one side plate portion 23c to the other side plate portion 23c, the fixing portions 135 of the two connecting members 35 and 35 attached to both sides of the support column 23 are fixed together. The
[0025]
The frame unit 25 is attached to the column 23 in advance by inserting the horizontal plate portion 35A of the connecting member 35 into the horizontal frame 30 from the notch 38 of the vertical frame 31 and temporarily fixing with the bolts 36 in this state. The portion 35B is brought into close contact with the side plate portion 23c of the support column 23, and the fixing portion 135 is fixed by the bolt 47 and the nut 48. Next, the distance between the support 23 and the frame unit 25 is adjusted to a predetermined distance, and the bolt 36 is tightened to fix the frame unit 25 to the connecting member 35.
[0026]
In such a fence 26, the bolt 47 is penetrated from the side of the column 23 to the opposite side, and the connecting member 35 is fixed to the side surface of the column 23. And the bolt 47 can be tightened. Therefore, it is not necessary to mount the body outside the fence 26 or install a scaffold, and the work of attaching the frame unit 25 to the support column 23 can be easily and quickly performed in a stable posture. Can be improved. Further, if the fixing portion 135 of the connecting member 35 is formed long enough to protrude to the roadway side more than the surface of the vertical frame 31 on the roadway side, the vertical frame 31 becomes an obstacle when the bolt 47 is tightened. Therefore, the bolt 47 can be securely tightened. Furthermore, since the joint part of the horizontal frame 30 and the vertical frame 31 is reinforced by the reinforcing plate 32, the strength of the joint part is large, and a sturdy frame unit 25 is obtained.
[0027]
In the above-described embodiment, an example in which the mesh net 24 is installed on the support post 23 in two upper and lower stages is shown, but the present invention is not limited to this and may be one stage. It is also possible to attach to or integrally with a vehicular protective fence provided on the end girder of the bridge.
[0028]
【The invention's effect】
As described above, in the fence according to the present invention, the fixed portion projecting toward the roadway is connected to the vertical plate portion of the connecting member that connects the frame unit of the mesh net and the support column, and the fixing portion is fastened. Since it is configured to be fixed to the side surface of the support column, it is possible for the operator to work on the roadway side without having to put out his hand or body to the road shoulder side. Therefore, the frame unit can be easily and quickly attached to the support column in a stable posture, and workability can be improved. Further, since the joint between the horizontal frame and the vertical frame is reinforced by the reinforcing plate, the strength of the joint can be increased.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a fence according to the present invention.
FIG. 2 is a front view showing a part of the main part of the fence in a broken state.
FIG. 3 is an exploded perspective view of main components of the fence.
4 is an enlarged sectional view taken along line IV-IV in FIG. 2;
FIG. 5 is a cross-sectional view taken along line VV in FIG.
6 is a cross-sectional view taken along line VI-VI in FIG.
7A, 7B and 7C are a front view showing a conventional fence, a view taken in the direction of arrow A, and a view showing a net fixing structure.
FIG. 8 is a cross-sectional view of a main part showing a conventional example of a fence.
[Explanation of symbols]
23 ... post, 24 ... mesh net, 25 ... frame unit, 26 ... rail, 32 ... reinforcing plate, 33 ... net fixing member, 35 ... connecting member, 35A ... horizontal plate, 35B ... vertical plate, 47 ... bolts, 48 ... nuts, 135 ... fixed parts.

Claims (2)

A mesh net, a frame unit that supports and fixes the outer periphery of the mesh net, and a connecting member that supports the frame unit and connects to the support column,
Each of the frame units is formed of an extruded profile, thereby forming a horizontal frame and a vertical frame comprising a hollow portion having a rectangular cross-sectional shape and a net support piece integrally connected to the hollow portion, and the mesh net It comprises a net fixing member that fixes an outer peripheral part to the net support piece,
A horizontal plate portion that fixes the connecting member to the horizontal frame, and a vertical plate portion that has a fixing portion that is formed wider than the horizontal plate portion and protrudes toward the roadway side from the roadway side end surface of the horizontal plate portion; The fence is characterized in that it is formed in an L shape, the vertical plate portion is brought into close contact with the side surface of the support column, and the fixing portion is fixed to the support column by fastening means. In the fence of Claim 1,
The frame unit is provided with a reinforcing plate that is fixed to both surfaces of the joining end portion of the horizontal frame and the vertical frame.

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