JP2002356821A - Wooden guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wooden guard fence capable of improving workability even when the guard fence is installed on a slope land and even when it is installed under a bent state in spite of a simple structure while being capable of linearly continuing an adjacent beam and also exchanging the beam easily. SOLUTION: The wooden guard fence is so constituted in such a manner that a vertically split groove 23 dividing a support 2 into two in the radial direction is formed to the upper section of the support 2, a bracket 4 is inserted into the vertically split groove 23 under the state in which both end sections in the longitudinal direction of the bracket are projected from the outer circumferential surface 21 of the support while being fixed onto the support 2 in an inclination adjustable manner by the first bolt 11 and a nut 14, bracket inserting grooves 34 are formed at both end sections of each beam 3, and the end sections of the brackets 4 are inserted into the bracket inserting grooves 34 while the brackets 4 and the beams 3 are fixed by the second bolts 12 and the nuts 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence, and more particularly to a so-called center beam type wooden protective fence.

[0002]

2. Description of the Related Art Conventionally, for example, cross-prevention fences for preventing pedestrians from crossing a road, and fall-prevention fences for preventing pedestrians and vehicles from falling off the road, etc., are known as "protection fences". "
It is collectively called. In general, a protective fence consisting of a plurality of columns standing at intervals and beams (horizontal members) bridged between adjacent columns has beams on opposite left and right side portions of the columns. It is broadly classified into a "center beam type" in which the beams are connected, and a "front beam type" in which a beam is connected to the front portion of the column.

In the front beam type protective fence, the thickness of the fence is the sum of the diameter of the support and the diameter of the beam. Therefore, in particular, the support fence and the beam are made of wood. Is required to be relatively thick) along the shoulder of a sidewalk or the like, it is difficult to secure the width of the sidewalk or the like. Therefore, it is desired that the wooden protective fence be configured as a center beam type that can easily secure the width of a sidewalk or the like.

A conventional center beam type wooden guard fence is as shown in FIG. That is, a circular columnar support 101 made of wood is formed with circular cutout recesses 102 on the left and right side portions thereof.
02, a horizontal columnar beam 1 made of wood
03 is inserted. In addition, a wood screw 104 is screwed from each beam 103 to the column 101, thereby preventing the end of the beam 103 from dropping out of the cutout recess 102.

However, in the protective fence as shown in FIG. 11, it is easy to install the fence linearly on a horizontal ground, but it is easy to install the fence on an inclined ground or in a state where the fence is bent left and right (curved). It is necessary to process the notch recess 102 and the end of the beam 103 into different shapes in accordance with the change in the mounting angle of the beam 103 with respect to the support 101, and the processing is troublesome, and the workability of the installation work is poor There was a disadvantage of becoming. When the beam 103 damaged for some reason is replaced with a new one, at least one of the columns 101 must be tilted because the distance between the pair of columns 101 supporting both ends of the beam 103 needs to be increased. Therefore, there is a disadvantage that beam exchange is difficult.

On the other hand, FIG. 12 shows another example of a conventional center beam type protection fence. In this protective fence, support members 112 are attached to left and right side surfaces of a support column 111, and connecting members 11 are attached to both left and right end portions of each beam 113.
4 is attached. Then, in a state where the support tool 112 and the connection tool 114 are overlapped with each other, they are connected and fixed with bolts and nuts 115, so that the beam 11
3 is supported by the support 111. Although such a configuration is often employed in a metal fence, it is naturally conceivable to apply a similar configuration to a wooden fence.

However, in this protective fence, FIG.
There is no problem when the fence is installed horizontally as shown in (a), but when the fence is installed on a slope, the beam adjacent to the right and left via the support 111 as shown in FIG. 11
Since the axes P of 3 are displaced from each other and a step is generated between the beams 113, the linearity (continuity) of the beams is impaired and the appearance of the protective fence is disadvantageously deteriorated. In addition, if the mounting positions of the right and left support members 112 of the column 111 can be independently adjusted in the height direction in accordance with the inclination of the installation place, the above-mentioned disadvantage can be solved. In such a case, the structure of the column 111 is reduced. The problem is that it becomes complicated and the cost becomes extremely high.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has a simple structure, and is applicable to installation on an inclined ground or in a bent state. It is an object of the present invention to provide a wooden protective fence that can improve the performance and can make adjacent beams continuous in a straight line, and can easily exchange beams.

[0009]

In order to achieve the above object, the present invention comprises a plurality of columns which are erected at intervals and a plurality of beams which are bridged between adjacent columns. In the wooden protective fence in which the support and the beam are made of wood, each support is formed with a vertically-divided groove radially dividing the support into two in the axial direction from the support upper end surface to a predetermined height position, A bracket made of a metal plate that is long in one direction is inserted into the vertical groove so that both longitudinal ends of the bracket protrude from the outer peripheral surface of the column, and the column and the column are substantially perpendicular to the vertical groove. The bracket is fixed to the column so that the inclination angle can be adjusted by a first bolt and a nut penetrating the bracket. At both ends of each beam, a bracket insertion groove that opens at least at an axial end surface of the beam is formed. This bra The end of the bracket protruding from the outer peripheral surface of the column is inserted into the socket insertion groove, and the second bolt and the nut penetrate the beam and the end of the bracket in a direction substantially orthogonal to the bracket insertion groove. And the beam are fixed.

[0010] In the above structure, the beam is provided with a back split groove cut radially inward from the outer peripheral surface thereof along the axial direction, and both ends of the back split groove are formed as bracket insertion grooves. Things.

In the above structure, a waterproof cap made of a waterproof material such as FRP is covered on the upper end of the support.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wooden guard fence according to an embodiment of the present invention will be described with reference to the drawings. 1 to 6
The installation state of the wooden protective fence is shown in FIGS.
Shows the components of the wooden fence. In addition,
In the drawings other than FIGS. 1 and 4, illustration of a grain pattern appearing on the surfaces of the columns and beams is omitted.

As shown in FIGS. 1 and 4, a wooden protective fence 1
Is mainly composed of a plurality of columns 2, a beam (horizontal member) 3 bridged between adjacent columns 2 and 2, a bracket 4 (4A, 4B) connecting the columns 2 and the beams 3, and a column. 2 and a waterproof cap 5 placed on the upper end.

First, the support column 2 will be described with reference to FIG. The strut 2 in this embodiment is made of lumber such as cedar thinned wood, and is formed into a cylindrical shape having a diameter of 120 mm and a length of 1200 mm. Reference numeral 21 denotes an outer peripheral surface of the strut 2, and 22 denotes an upper end surface. Reference numeral 23 denotes a vertically dividing groove formed on the upper portion of the column 2. The vertical dividing groove 23 divides the support column 2 into two parts in the radial direction, and
From, to a predetermined height position about 340mm below,
The support 2 is formed to extend in the axial direction. Vertical groove 23
Has a groove width of about 3 to 4 mm.

Further, two through holes 24 for inserting a first bolt, which will be described later, are provided at a predetermined interval (here, 250 mm) in a portion of the column 2 where the vertical groove 23 is formed. Is formed. Both through-holes 24 are formed so as to penetrate the column 2 in a diameter direction orthogonal to the groove direction of the vertically dividing groove 23.

FIG. 8 shows the beam 3. Beam 3
Is the same wood as that used for the column 2 with a diameter of 100m.
The reference numeral 31 indicates an outer peripheral surface of the beam 3 and 32 indicates end surfaces of both ends in the axial direction of the beam 3, respectively. The beam 3 has a back split groove (saw) 33 cut radially inward from the outer peripheral surface 31 at a predetermined depth, and is formed along the entire length of the beam 3 along the axial direction. The depth of the back split groove 33 is about 30 mm.
Is formed to a depth that cuts beyond the axis of the bracket 4, and this portion is a bracket insertion groove 34 into which the bracket 4 (4A, 4B) is inserted. Therefore, in this embodiment, the bracket insertion groove 34 is formed between the end face 32 and the outer peripheral face 3 of the beam 3.
1 is open. In addition, the groove width of the back split groove 33 and the bracket insertion groove 34 is about 3 to 4 mm similarly to the vertical split groove 23.

The bracket insertion groove 3 of the beam 3
At both end portions where the 4 is formed, through holes 35 for inserting a second bolt to be described later are formed at predetermined intervals (here, 55 mm in this case) two on each side. Each through hole 35 is formed so as to penetrate the beam 3 in a diameter direction orthogonal to the groove direction of the bracket insertion groove 34.

The column 2 and the beam 3 are filled with a chemical for imparting an antiseptic / anticidal effect. The injection of the drug can be performed by a known pressure preservative treatment method. That is, the column 2 and the beam 3 processed into the above-described shapes are put into a closed tank (not shown) filled with a chemical solution, and a certain pressure is applied to penetrate the medicine into the column 2 and the beam 3. .

9 and 10 show a bracket. The bracket 4 shown in FIGS. 9A and 9B has a thickness of 3 mm.
Is formed by cutting a stainless steel plate (an example of a metal plate material) into a rectangular shape that is long in one direction (here, 40 mm wide × 410 mm long). In the longitudinal center of the bracket 4,
A through hole 41 for inserting a first bolt described later is formed, and a through hole 42 for inserting a second bolt described later is provided at a predetermined interval (here, at both ends in the longitudinal direction of the bracket 4). 55mm), two on each side.

A bracket 4A shown in FIG. 9 (c) is used for connecting the column 2 and the beam 3 located at the end of the fence, and is similar to a bracket 4A having one end cut off. It has a shape. The bracket 4B shown in FIGS. 10A and 10B is used when connecting the column 2 and the beam 3 located at the corners of the fence. About 45 ° with respect to the central part having through holes 41
Are formed so as to form an angle. Of course, these brackets 4A and 4B are also formed from the same stainless steel plate as the bracket 4.

Next, the wooden protective fence 1 formed by using the above components will be described with reference to FIGS. FIG. 1 is a front view showing a state where the wooden protective fence 1 is installed on a horizontal ground, FIG. 2 is an enlarged front view of a main part of FIG. It is sectional drawing which follows the A line. The plurality of columns 2 are erected on the ground G at predetermined intervals with the lower ends buried in the ground. And, between the adjacent columns 2, 2, the upper and lower two beams 3,
3 are horizontally extended at predetermined intervals. Each beam 3 is arranged with the opening of the back split groove 33 facing downward, and the beams 3 adjacent to each other on the left and right via the column 2 are connected via the bracket 4 and supported on the column via the bracket 4. Have been.

That is, as shown in FIGS. 2 and 3,
The bracket 4 is inserted into the vertical groove 23 with both ends in the longitudinal direction protruding from the outer peripheral surface 21 of the column 2, and the central through hole 41 of the bracket 4 is inserted into the through hole 24 of the column 2. The first bolt 11 is inserted into the matched through-hole 24 and through-hole 41. In this embodiment, as the first bolt 11, a so-called "cut bolt" having no bolt head and having an external thread engraved over its entire length is used. Cap nuts 14 are screwed into both ends of the first bolts 11 projecting from the outer peripheral surface 21 of the support column 2 via washers 13, respectively.

Both ends of the bracket 4 protruding from the outer peripheral surface 21 of the column 2 are respectively inserted into bracket insertion grooves 34 of the beam 3. Then, the second bolts 12 are inserted into the matched through-holes 35 and the through-holes 42, respectively, with the through-holes 42 of the bracket 4 aligned with the through-holes 35 of the beam 3. The second bolt 12 is also formed of a cut bolt similarly to the first bolt 11, and the second bolt 12 protruding from the outer peripheral surface 31 of the beam 3 is formed.
The cap nuts 16 are screwed to both ends of each of them through washers 15.

After finely adjusting the positional relationship, inclination, etc. of each of the columns 2 and each of the beams 3, the brackets 4 are fixed to the column 2 by tightening the cap nuts 14 and 16. 3 is fixed. That is, since the groove widths of the vertical groove 23 and the bracket insertion groove 34 are equal to or slightly larger than the thickness of the bracket 4, the wooden nuts are tightened by tightening the cap nuts 14 and 16 so that the wood can be removed from both sides. By being compressed and deformed, the groove inner surfaces of the vertical groove 23 and the bracket insertion groove 34 are strongly pressed against the side surface of the bracket 4, and the support 2 and the beam 3 are firmly fixed to the bracket 4 by the frictional force generated thereby. It is.

As shown in FIG. 2, the waterproof cap 5 has a cylindrical peripheral wall portion 51 having an inner diameter into which the upper end of the column 2 can be inserted, and an arc-shaped cross-section for closing the upper end opening of the peripheral wall portion 51. The top wall 52 is integrally molded with a waterproof material such as FRP. After attaching the bracket 4 as described above, the waterproof cap 5 is externally fitted to the upper end of the column 2 and is fixed to the column 2 by screwing a wood screw 53 that reaches the column 2 through the peripheral wall 51. I have.

FIG. 4 is a front view showing a state in which the wooden protective fence 1 is installed on an inclined ground, and FIG. 5 is an enlarged front view of a main part of FIG. In these figures,
The support 2 is erected on the ground G inclined at an angle of about 15 °,
The upper and lower two beams 3 and 3 are extended substantially parallel to the ground G at predetermined intervals between the adjacent columns 2 and 2. As shown in FIG. 5, the bracket 4 is also fixed in a state where its longitudinal direction is inclined by about 15 ° with respect to the horizontal direction.

That is, as described above, each bracket 4
Is attached to the column 2 by a single first bolt 11, and if the cap nut 14 is in a temporarily fixed state (a state before it is strongly tightened), the bracket 4 is moved around the axis of the first bolt 11 (bracket). 4 around a horizontal axis that is substantially perpendicular to the longitudinal direction, and the inclination angle can be adjusted to match the inclination angle with the inclination angle of the ground. Therefore, when the cap nuts 14 and 16 are temporarily fixed and the angle of the bracket 4 and the beam 3 is adjusted so that the inclination angle of the beam 3 is substantially equal to the inclination angle of the ground G, the cap nuts 14 and 16 are tightened. The bracket 4 and the beam 3 can be fixed to the column 2 at that angle.

By making the angle of inclination of the bracket 4 and the beam 3 substantially equal to the angle of inclination of the ground G as described above, the center axes of the beams 3 and 3 adjacent to each other on the left and right via the column 2 are aligned. They can be arranged on a line, and it is possible to prevent a step from occurring between these beams 3. Therefore, even when installed on a sloping ground, an excellent appearance in which the adjacent beams 3, 3, ... can be seen continuously in a straight line is obtained, and the workability is as good as when installed on a horizontal ground. Installation work can be performed.

FIG. 6 shows a corner of the wooden protective fence 1 in FIG.
3 is a cross-sectional view corresponding to FIG. 3, and each component is denoted by the same reference numeral as in FIG. 3, and redundant description will be omitted. In the corner portion shown in FIG. 6, the bracket 4B is used instead of the bracket 4, whereby the axial directions of the adjacent left and right beams 3, 3 via the column 2 differ by 90 ° in plan view. A corner portion (that is, a corner angle of 90 °) is formed.

Since the brackets 4 and 4B are formed of a stainless steel plate having a thickness of 3 mm as described above, if appropriate tools such as pliers are used, the brackets 4 and 4B can be easily bent even at the construction site of the protective fence. Can be. Therefore, the corner angle is close to 180 °, for example, 160 °
When forming a corner portion having an angle of 140 ° or 140 °, the bracket 4 is appropriately bent so that the corner angle is close to 90 °, for example, 110 °.
When a corner portion having an angle of, for example, 70 ° is formed, a bracket corresponding to any corner angle can be obtained by appropriately adjusting the bending angles of both ends of the bracket 4B. For these reasons,
This wooden protective fence 1 can be installed extremely easily even when it is installed along a promenade that is bent (curved) left and right, for example, and the workability is not deteriorated.

As described above, the column 2 and the beam 3 are filled with a chemical for preserving and termite-preventing. This pressurized injection treatment is performed by the vertical groove 23 of the column 2 and the back of the beam 3. Since the cutting can be performed after the formation of the dividing groove 33, the medicine penetrates into the xylem also from the inner surface of the groove, so that the medicine can be penetrated from the column 2 and the beam 3 as compared with the case where the medicine permeates only from the outer peripheral surface. It is possible to penetrate and inject deep inside. Therefore, in this wooden protective fence 1, it is possible to effectively prevent the strut 2 and the beam 3 made of wood from being damaged by propagation of rot fungi and damage by termites, and to extend the service life thereof. In addition, the support column 2 has its upper end surface 2
Since the vertical groove 23 is opened in the wooden guard fence 2, if rainwater or the like penetrates through the groove 23, the durability of the strut 2 is reduced. In this wooden guard fence 1, the waterproof cap 5 is put on the upper end of the strut 2. Thereby, penetration of rainwater or the like from the upper end face 22 and the vertical groove 23 into the support 2 can be prevented as much as possible, and the durability of the support 2 can be improved from this point as well.

If the beam 3 is damaged for any reason, the damaged beam 3 is removed by a simple operation of simply removing the cap nut 16 from the second bolt 12 fixing both ends of the beam 3 to the bracket 4. And a new beam 3 can be easily attached. Therefore, the wooden fence 1 also has the advantage that the beam 3 can be easily replaced.

Further, the vertically dividing groove 23 is formed on the upper end face 22 of the column 2.
, The vertical groove 23 can be formed by a simple process of making a saw by a saw from the upper end side of the column 2 to a predetermined position, and the processing cost of the column 2 Has the advantage that the cost can be reduced.

It is needless to say that the wooden fence according to the present invention is not limited to the above-mentioned ones. For example, the diameters and lengths of columns and beams, and the shapes and dimensions of brackets are not limited to those described above. Various design changes are possible as needed. In the above description, a wooden guard fence of "two-stage beam" in which two beams are bridged between adjacent columns is shown, but the number of beams bridged between adjacent columns is at least three. But it doesn't matter. In the above description, the first bolt and the second bolt are cut bolts having no bolt head, but for example, a bolt having a head such as a hexagon bolt can be used as the first bolt and / or the second bolt. Of course there are. Similarly, in the above description, the cap nut is used in combination with the first bolt and the second bolt, but it is also possible to use a normal hexagon nut or a nut having another shape. Further, in the above description, the through hole formed in the bracket is a round hole, but it may be a long hole extending in the longitudinal direction of the bracket to have flexibility in dimensional adjustment. Furthermore, although both ends of the back split groove of the beam are bracket insertion grooves in the above description, a configuration in which a bracket insertion groove that opens only at the end face in the beam longitudinal direction without forming the back split groove in the beam may be considered. . However, in such a configuration, the forming process of the bracket insertion groove becomes slightly difficult. In this regard, if the back split groove and the bracket insertion groove are integrally formed as described above, an advantage is obtained in that the beam can be easily processed by merely sawing it with a circular saw.

[0035]

As is clear from the above description, the wooden fence according to the present invention is of a so-called sweater beam type, so that it is easy to secure the width of the sidewalk and the like, and it is also necessary to make the parts of complicated shape. Although it has an extremely simple structure that does not require any other means, the installation work can be performed with good workability even when it is installed on a slope or in a bent state.
In addition, when installed on a slope, the beams adjacent to the left and right can be made continuous in a straight line, so that the appearance of the protective fence can be improved and the damaged beam can be easily replaced. In addition, since the support column is formed with a vertically split groove, when a drug is injected into the support column, it can also penetrate from the inner surface of the vertically split groove, and the effect of increasing the injection efficiency of the drug can also be obtained. can get.

In addition, in the case where both ends of the back split groove of the beam are configured as bracket insertion grooves, when a drug is injected into the beam, it can be penetrated from the inner surface of the back split groove,
The efficiency of injecting the medicine can be improved, and the breakage of the beam can be reduced as compared with the case where only the bracket insertion groove is formed.

Further, when the waterproof cap is placed on the upper end of the support, rainwater or the like can be prevented from penetrating into the support as much as possible from the upper end surface of the support and the vertical groove, and the durability of the support can be improved. Performance can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an installation state of a wooden protective fence according to one embodiment of the present invention on a horizontal ground.

FIG. 2 is an enlarged front view of a main part of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a front view showing a state in which a wooden protective fence according to one embodiment of the present invention is installed on a slope.

FIG. 5 is an enlarged front view of a main part of FIG. 4, showing a part in cross section.

6 is a sectional view showing a corner portion of the wooden protective fence in a section corresponding to FIG. 3;

FIG. 7A is a partially omitted side view of a support, and FIG.
FIG. 7B is a cross-sectional view taken along the line BB of FIG.

8A is a side view showing an axial end face of the beam, and FIG. 8B is a partially omitted cross-sectional view along the line CC in FIG. 8A.

FIG. 9A is a front view of the bracket, and FIG.
FIG. 9B is a cross-sectional view taken along the line DD of FIG.
(c) is a front view of another bracket.

10 (a) is a plan view of another bracket, and FIG. 10 (b) is a front view of the bracket of FIG. 10 (a).

FIG. 11 is an explanatory sectional view showing a conventional wooden protective fence.

FIG. 12 is an explanatory front view showing another example of the conventional protective fence.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wooden protective fence 2 Prop 21 Outer peripheral surface 22 Upper end surface 23 Vertical split groove 3 Beam 31 Outer peripheral surface 32 End surface 33 Back split groove 34 Bracket insertion groove 4, 4A, 4B Bracket 5 Waterproof cap 11 First bolt 12 Second bolt 14, 16 Cap nut

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D101 CA06 DA00 EA02 EA11 FA13 FA21 FB14 GA00 2E101 FF09 JJ04 JJ06 MM06 PP00 2E142 AA10 DD10 DD22 HH01 HH12 HH22 LL01 MM04

Claims (3)

[Claims] 1. A wooden protective fence comprising: a plurality of columns erected at intervals; and a plurality of beams spanned between adjacent columns, wherein the columns and beams are made of wood. A vertically dividing groove for radially dividing the supporting column into two is formed extending in the axial direction from the upper end surface of the supporting column to a predetermined height position, and a bracket made of a metal plate material elongated in one direction is formed in the vertical dividing groove. The bracket is tilted by a first bolt and a nut penetrating the support and the bracket in a direction substantially orthogonal to the vertical groove, while both ends in the longitudinal direction are projected from the outer peripheral surface of the support. The beam is fixed to the column so that the angle can be adjusted. At both ends of each beam, a bracket insertion groove that opens at least at the axial end surface of the beam is formed. And the bracket and the beam are fixed by a second bolt and a nut penetrating the beam and the end of the bracket in a direction substantially orthogonal to the bracket insertion groove, while the end of the bracket is inserted. Wooden guard fence. 2. The beam according to claim 1, wherein a back split groove cut radially inward from an outer peripheral surface of the beam is formed along the axial direction, and both ends of the back split groove are formed as bracket insertion grooves. Wooden guard fence as described. 3. The wooden protective fence according to claim 1, wherein a waterproof cap made of a waterproof material such as FRP is covered on an upper end of the pillar.