JP2006328633A - Guard fence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guard fence which has a high degree of durability while securing landscape beauty brought about by wood. <P>SOLUTION: In this guard fence wherein wooden beams are each mounted among respective supports erected over a required span and wherein a reinforcing member is inserted into the wooden beam, the reinforcing members as a required number of tension members make the respective wooden beams 7 develop prestress via a tension means. Additionally, each of the wooden beams 7 can be singly prestressed, or glued laminated wood can be used for the beam body 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a protective fence constructed on a road shoulder or a boundary between a roadway and a sidewalk.

An invention for protecting against breakage of a protective fence by inserting a reinforcing material through a cushioning material made of wood and preparing for aging of the wood is disclosed in JP-A-8-326023 (Patent Document 1) and has the same purpose as described above. However, an invention of a protective fence in which a reinforcing material is inserted in a lateral groove provided on the back side of the cushioning material while omitting the work of hollowing out the cushioning material made of wood is disclosed in Japanese Patent Laid-Open No. 9-88026 (Patent Document 2). Has been.
Since both Patent Documents 1 and 2 are not the technical idea of pre-stressing the cushioning material in advance, when an external force is applied to the cushioning material due to an automobile accident or the like, the cushioning material is received by the reinforcing material after the damage and the passenger or vehicle The impact stress of the cushioning material is relaxed when an external force is applied, and the durability of the beam itself is poor because the cushioning material and the reinforcing material do not resist together. is there.
In addition, since it cannot follow the dimensional change due to drying and swelling of wood, loosening during drying contributes to accelerated aging.
JP-A-8-326023 Japanese Patent Laid-Open No. 9-88026

  The present invention seeks to provide a highly durable protective fence while ensuring the beauty of the landscape due to the wood.

The guard fence according to claim 1 of the present invention is a guard fence in which a wooden beam is attached between struts erected in a required span, and a reinforcing material is inserted into the wooden beam.
The reinforcing material is a required number of tensile materials, and each wooden beam is prestressed through tensioning means.
The protective fence according to claim 2 is the protective fence according to claim 1,
Each of the wooden beams disposed between the columns is prestressed independently by the tensile material.
The protective fence according to claim 3 is the protective fence according to claim 1 or 2,
The wooden beam is made of laminated timber.

  When wooden beams are installed as protective fences, prestress as a compressive stress is developed in each case, so when an external force such as a car crash, landslide or avalanche acts, the external force is applied to the wooden beam. While the internal stress is released because the tensile stress is applied to the cross section of the main body, the reinforcing material inserted inside corresponds to the tensile stress. With both the reinforcement and the external force, the durability is improved and the end cap is joined with no gap corresponding to the expansion and contraction of the wood, so it is aged by the intrusion of rainwater or snowmelt water from the mouth. There is an effect that can be prevented.

  When end caps are fitted to both ends of each wooden beam, there are proposed ones that cause prestress to be generated for each wooden beam, and those that cause prestress to be expressed collectively for a plurality of wooden beams. The support for supporting the wooden beam is provided by a wooden support or a steel support. In the case of a wooden support, an outer peripheral groove is formed around the bracket for joining the end cap, and the end cap is fitted to the upper and lower ends. Prestress is expressed by tightening a nut to a pipe or an anchor bolt that is inserted through a wooden support through the nut. In the case of a steel support, a bracket for joining the end cap is welded to a key point. A wooden beam is made of laminated wood. When multiple wooden beams are attached to a column, the cross section of each wooden beam is the same, and the cross section of the wooden beam attached to the upper end is compared to other wooden beams. Even those with large cross-sections are selected. The wooden beam placed on the vertical gradient surface in the vertical plane only needs to adapt the vertical machining of the end surface to the gradient, and if it is straight with respect to the corner, it needs a planar end surface This can be handled by adapting to the corner angle, and in the case of an arc shape, it can be handled depending on the degree of curvature if the span is shortened.

The guard fence A according to the present invention will be described with reference to an embodiment. As shown in FIG. 3, the wooden beam body 1 formed in a required length with a vertically long rectangular cross-sectional shape made of laminated timber is vertically moved over the left and right mouths. Two insertion holes 2 having a required diameter are provided, round steel rods 3 as tensile members are inserted into the respective insertion holes 2, and screws are provided at right and left ends of the round steel rod 3 over a required length. A U-shaped steel end cap 5 provided with a screwed portion 4 and being in contact with each end of the screw guides the screwed portion 4 to a screw insertion hole (not shown), and both screwed portions 4 By tightening the nut 6 screwed into the nut, a prestress as a compressive stress is generated inside the wooden beam body 1, and the wooden beam (hereinafter referred to as a tightening torque of a torque wrench) can be confirmed in a required prestressed state. 7) is formed. The steel column 8 shown in FIG. 5 (a) is a flat square shape, and is formed by integrating a receiving portion 8b of the required height with a flat I shape on the top surface of the column main body 8a having the required height. It is buried in the ground at a mounting interval of. Each beam 7 is fitted with an end cap 5 in the groove of the receiving portion 8b of each column, and its own weight is supported on the top surface of the column main body 8a, and the receiving portion 8b and the end cap 5 are welded in a stable posture. A steel head cap 10 is fitted to a step portion 9 between the upper surface of the wooden beam body 1 and the upper end of the end cap 5, and is screwed to the upper end of the receiving portion 8b. As shown in FIG. 2, a winding sleeve 11 processed into an arc shape on the inner side is joined with bolts and nuts to the outer end of the support column 8 on the outermost end side (only the left end side is shown in the first embodiment). As shown in FIG. 1, it is constructed on the road shoulder or the boundary between the roadway and the sidewalk.
The guard fence A1 shown in FIG. 4 is the guard fence A in which the length of the wooden beam body 1 is made almost twice as long, and a projection 8c is formed on the top surface of the column body 8a shown in the partial view (b) of FIG. A projection 8c is fitted and supported in a fitting groove 13 in which an intermediate portion of the wooden beam main body 1 is cut out along the longitudinal direction of the lower surface of the auxiliary beam 12 protruding.

  6 and FIG. 7 will be described. Each beam 7 joined between the columns 8 and 8 shown in FIG. 5A is formed at the ends of both ends of the wooden beam body 1 as shown in FIG. An end cap 14 made of a U-shaped steel is externally fitted, and two insertion holes 2 are formed through the top and bottom of the wooden beam main body 1 on the left and right ends as shown in FIG. Since the guard fence B is a mechanism for prestressing each beam 7 by fastening a plurality of beams 7 together, the round steel bar 3 inserted into the insertion hole 2 is attached to each column at both outermost ends. It extends to the outer surface of the web 15 of the eight receiving portions 8b. Therefore, the screwing portions 4 are disposed on both outer end sides, and the insertion holes 2 of the round steel bar 3 are provided through the end caps 14 and the webs 15 of the receiving portions 8b. In the wooden beam body 1 at either outermost end (left side in the present embodiment 2), the guide hole 17 of the fastener 16 that is thicker than the insertion hole 2 is opened from the outer end over the required length. . Therefore, the fastener 16 is integrated in the left guide hole 17 of the round steel bar 3 inserted into each insertion hole 2, and the threaded portion 4 from the outer surface of the web 15 at the receiving portion 8 b of the column 8 at the left and right ends. When the nut 6 is screwed to the right end and the right end nut 6 is tightened, the left fastening bracket 16 is crimped to the bottom surface of the guide hole 17, and if the left nut 6 is tightened in this state, the left end support 8 Each wooden beam body 1 is uniformly compressed through the other struts 8 in the temporarily embedded state except for the desired prestress. Winding sleeves 11 are joined to the outer ends of the columns 8 on both outer ends, and are constructed at the required locations similar to those described above.

The guard fence C shown in FIG. 10 will be described. The support column 8 is provided in the outside beam type shown in FIG. 10 (b) and the center beam type shown in FIG. 10 (c). In the former outside beam type, as shown in FIG. 11, a pair of upper and lower brackets 18 are projected over one side of the steel circular support column 8 over the required number of steps (three in this embodiment). In the beam 7, a round steel bar 3 having screwed portions 4 with screws at both ends is inserted into insertion holes 2 that penetrate through the left and right mouths of the wooden beam body 1 having a circular cross section. The joint 4 is guided by a screw insertion hole (not shown, equivalent to the insertion hole 2) of the round end cap 19 having an I-shaped longitudinal section that is externally fitted to the ends of both ends, and screwed into each screwing part 4. By tightening the nut 6, each beam 7 independently causes prestress in the interior of the wooden beam body 1, and in this state, the end cap 19 is connected with a bolt and nut between the pair of brackets 18 of each step of each column 8. By fastening, each beam 7 is attached to the column 8, Cylindrical end cap 20 respectively at the pillar 8 of the outer end bracket 18 of each stage is formed by bonding.
In the latter type of center beam, as shown in FIG. 12, the center of the large-diameter ring 21 of the bracket 22 that is externally fitted to each stage with a large-diameter ring 21 on a steel column 8 and fixed with bolts and nuts. A pair of receiving cylinders 23 that are integrally provided facing the outer periphery of the large-diameter ring 21 with the horizontal axis passing through as an axis are opened, while the wooden beam body 1 having a circular cross section extends over both ends. The round steel bar 3 is inserted into the through-holes 2 penetrating through, and the screwing portions 4 at both ends are guided by the screw insertion holes of the end caps 19 fitted to the ends of the both ends, and screwed into the screwing portions 4. By tightening the nut 6, prestress is developed inside the wooden beam body 1, and in this state, the other end of each end cap 19 is fitted into the receiving tube 23 of the corresponding bracket 22, and bolts and nuts are used. Fixed and after each bra Diameter ring 21 of Tsu sheet 22 is fitted to the strut 8, the bolts at strategic points, being secured by a nut. Cylindrical terminal caps 20 are joined to the receiving cylinders 23 of the brackets 22 at both outer ends.
As shown in FIG. 13, the beam 7 in the guard fence C is bent with a required radius of curvature such as a round shape or a square shape, and is rounded to a wooden beam body 1 made of laminated material having an insertion hole 2 penetrating. A shape in which a steel rod 3 (mainly a wire cable is selected) is inserted, end caps 19 are externally fitted to both ends, nuts 6 are screwed and fastened to both screwed portions 4, and are curved in an arc shape. Can also provide pre-stressed products.

Referring to the guard fence D shown in FIG. 14, the wooden beam body 1 is circular in cross section, and the insertion hole 2 extends through both the mouths. The round steel rod 3 inserted into the insertion hole 2 through the screw insertion hole of the end cap 24 is tensioned by the nuts 6 that are screwed into the screwing portions 4 provided at both ends. As shown in FIG. 15, the fastening bracket 16 integrated with the round steel bar 3 is housed in a large-diameter guide hole 17 that opens concentrically with the insertion hole 2 from the left end of the beam 7 on the left side of the outermost end. Each wooden beam main body 1 is made to express required pre-stress through a support column 29 which is pressure-bonded to the bottom of the guide hole 17 and disposed at the other outer end, an intermediate support column 29 and an auxiliary support column 25. In this state, the columns 29 and the auxiliary columns 25 are fixed to the ground with the cast concrete 26 except for the columns 29 arranged on either side (the side where the fastening bracket 16 is provided).
The auxiliary support column 25 shown in the part (b) of FIG. 14 has an outer periphery of the beam 7 of the wooden beam body 1 appropriately attached to each left semicircular arc portion 25b of the support body 25a, and a partition 25c in the center in the width direction. The left and right sides of the bottom plate 25d are fixed to the anchor bolts 27 with nuts 28, and the support column 29 shown in a partial diagram (c) is round steel on the receiving metal 29b that protrudes integrally at the center in the left width direction of the support column body 29a. The insertion hole 2 through which the rod 3 is inserted is penetrated, and the left and right sides of the bottom plate 29d are fixed to the anchor bolts 27 with nuts 28 with the partition 29c sandwiched in the same manner as the auxiliary support column 25.
In the struts 29 at both outer ends, the inner end of a terminal cap 30 having a spherical outer end is fitted into a cylindrical end cap 24 having a U-shaped cross-section that is fastened together with a nut 6 to the screwing portion 4 and screwed. It consists of

Referring to the guard fence E shown in FIG. 16, the wooden beam body 1 is rectangular in longitudinal section, and the beam 7 attached to the uppermost stage of the support column 31 and the auxiliary support column 32 is the wooden beam body 1 made of horizontally long laminated material. , Two insertion holes 2 penetrating over both the mouths, and a U-shaped cross-section that fits the phases of the insertion holes 2 and is screwed through or inserted into the respective mouths. The wooden beam body 1 of the beam 7 composed of a rectangular tube-shaped end cap 33 and disposed at each subsequent stage is composed of a laminated material having a square cross section, and is made of steel as shown in a part (b) of FIG. The column 31 is provided with a support 31b having the same shape as the longitudinal section of each beam 7 attached to the center in the width direction on the left side of the column body 31a, and two inserts are inserted into the uppermost support 31b. There is one hole 31b in the center of the receiver 31b which is provided with a hole 2 and protrudes in the lower middle stage. As shown in the same figure (c), the auxiliary strut 32 disposed between the two struts 31 penetrates the auxiliary strut 32 and is attached to the uppermost stage on the leftmost stage. A horizontal L-shaped notch 32a is provided as a holding seat 7, and a lower horizontal concave notch 32b is disposed at the lower stage of the interruption.
The beam 7 attached to the column 31 disposed at the outer end of either one (left side in the present embodiment 5) is penetrated through the wooden beam main body 1 as shown in a partial view (a) of FIG. A large-diameter guide hole 17 is disposed concentrically from the outer end of the insertion hole 2 to a required depth, and a fastening bracket 16 integrated with a round steel bar 3 inserted into the insertion hole 2 is provided at the bottom of the guide hole 17. Are engaged, and a nut 6 is screwed into the threaded portion 4 at one end of the round steel bar 3 and tightened, and a required number of beams 7 are inserted into the threaded portion 4 at the other end of the round steel bar 3. The nut 6 is screwed from the outer surface of the receiving bar 31b projecting from the support 31 through the hole 2 and tightened, so that a required prestress is generated in the beam 7 through each support 31. A terminal cap 34 is attached to the pillars 31 at both outer ends via the end caps 33, and the pillars 31 at important points are fixed to the cast concrete in the manner described above, and a protective fence E such as a road is constructed.

The protective fence F shown in FIG. 18 will be described. In the outside beam format, a plurality of beams 7 are collectively expressed with prestress to improve durability, but the support is characteristic.
As shown in FIG. 20 (a), at one end of the guard fence, in the insertion hole 2 penetrating the wooden beam body 1, a large diameter guide hole 17 is formed concentrically from the outer end to the required depth. A screw fitting in which a fastener 16 integrated with the round steel bar 3 inserted into the insertion hole 2 is attached to the bottom of the guide hole 17 and a screw at the outer end of the round steel bar 3 is provided. The section 4 is a U-shaped cross-section with a rectangular cross section that fits around the outer end of the wooden beam body 1 having a rectangular cross section, and a plan view wooden hook shape that engages with the outer peripheral groove 36b of the column body 36a of the column 36. A projecting portion 37a corresponding to the handle portion of the bracket 37, and a rectangular tube-like engagement for attaching a bottomed rectangular tube-shaped end cap 43 to the outer end with a U-shaped cross section in contact with the outer surface of the projecting portion 37a. It extends from the insertion hole 2 formed in series with the bottom of the fitting 38 (same as the end cap 35), If the nut 6 is screwed and tightened from the extended portion, the beam 7 fitted with the end cap 35, the protruding portion 37a of the bracket 37, and the engaging metal fitting 38 are fastened together, and a partial view at the intermediate portion is provided. Since each beam 7 is also supported in the state which penetrated the round steel bar 3 in the protrusion part 37a as shown to (b), in the support | pillar 36 (not shown) of the other outer end, the extension part of the screwing part 4 is shown. When the nut 6 is screwed and tightened, the beam 7 with the end cap 35 fitted, the projection 37a of the bracket 37, and the engagement fitting 38 with the terminal cap 43 attached to the outer end are fastened together. Of course, since the support column 36 shown in the partial diagram (a) is a fixed support column, the required prestress is applied to each beam 7 in a bundled state via the other floating support columns 36 other than the support column 36. To express. After the pre-stress is applied, each floating column 36 is fixed by the cast concrete 26.
When each column is fixed in advance with an accurate span, it is more labor-saving in the field work to fix the beam 7 on which the prestress is expressed in a single beam unit to the column.
The column 36 used in the outside beam type guard fence F will be described in detail. As shown in FIG. 19, the column main body 36a is made of a laminated material having a rectangular cross section and is screwed at the upper and lower ends at the center. The provided core member 39 (which may be a pipe or a round bar) is inserted, the same end cap 40 is externally fitted up and down, and tightened with the upper and lower nuts 41 to develop prestress, and in three stages in the vertical direction. A wooden mallet-like bracket 37 is engaged with each of the outer circumferential grooves 36b that are provided in a recess on the four circumferences, and the insertion hole 2 of the round steel bar 3 is provided through the projecting portion 37a of the handle portion. 37a is spot-welded so that the bracket 37 is securely attached to the outer peripheral groove 36b of the column main body 36a, the head cap 42 is covered on the top, and screwed to the top of the core member 39 with a screw.

The guard fence G shown in FIG. 21 will be described. Each beam 7 is prestressed independently in the center beam format.
The column main body 44a of the column 44 has the same configuration as that shown in FIG. 19, but the bracket 45 is a pair of symmetrical hats in the front-rear direction. The part 45a is integrated by spot welding or the like, and the upper and lower end caps 47 are tightened with nuts 41 through the core member 46 to cause prestress in the column main body 44a, and the head cap 42 is cored with screws on the top surface. The top of the member 46 is screwed and covered.
As shown in FIG. 22, the beam 7 has a rectangular tube shape with an I-shaped cross section that is externally fitted to both ends (outer ends) in the insertion holes 2 penetrating the both ends of the wooden beam body 1 having a rectangular cross section. The round steel bar 3 is inserted through the insertion holes of the end caps 48, and screwed portions 4 having screws are disposed at both outer ends of the round steel bar 3, so that the outer surfaces of the webs 15 of the respective end caps 48 are provided. A nut 6 is screwed to each screwing portion 4, and a necessary prestress is expressed inside the wooden beam body 1 by tightening each nut 6 as required.
The beam 7 formed in this manner is communicated in series by externally fitting the inner surface on the opening side of the end cap 48 to each outer surface of a laterally U-shaped spacer 49 provided sandwiching the flange 45a of the bracket 45 of the column 44. Bolts 50 are inserted into the bolt holes and fastened with nuts 50a. At the outermost end, the opening portion of the U-shaped folded portion 51a is externally fitted to both flange portions 45a at the opening end of the terminal cap 51, Bolts 50 are inserted into the connected bolt holes, fastened with nuts 50a and terminal caps 51 are attached, and the protective fence 9 shown in the partial diagram (a) of FIG.

  Referring to the guard fence H shown in FIG. 23, the vertical cross-sectional rectangle of the wooden beam body 1 in the guard fence F shown in FIG. As shown in FIG. 24, as shown in FIG. 24, the protective fence F and Since it is the same, the code | symbol in a member structure uses what was used for the guard fence F, and the description is abbreviate | omitted.

  The guard fence I shown in FIG. 25 will be described. In the center beam format, the wooden beam body 1 in the guard fence G shown in FIG. 26, as shown in FIG. 26, the member configuration and each beam 7 to be arranged are compared with FIG. The reference numerals in FIG. 3 are the same as those used for the protective fence G, and the description thereof is omitted.

The guard fence J shown in FIG. 27 will be described. Between the H-shaped steel columns 53 and 53 erected on the retaining wall 52 with a required span, the beam 7 has a I-shaped cross section joined to both ends thereof. A required number of steps (five steps in the present embodiment 10) are inserted by dropping with a rectangular tube-shaped end cap 54, and a square steel head cap 55 is covered on the top surface.
As shown in FIG. 28, the beam 7 to be used has five insertion holes 2 extending through both ends of the wooden beam main body 1 made of a laminated material having a vertically long rectangular cross section. The end caps 54 having insertion holes 2 that are in phase with each other and opened in the web 15 are externally fitted, and both outer ends of the five round steel bars 3 that are inserted into the respective insertion holes 2 from the outer surfaces of the webs 15 of both end caps 54. Since the threaded portions 4 having screws at the ends are extended to the outer surface of the web 15, nuts 6 are threadedly engaged with the threaded portions 4, and the nuts 6 at both outer ends are tightened. Necessary pre-stress is developed inside the beam body 1.
Of the five insertion holes 2 penetrating the wooden beam body 1 and both end caps 54, the pipe is inserted with the central insertion hole 2 having a large diameter, and screws are screwed to both outer ends of the pipe. The nut is screwed onto the screw and tightened to cause the wooden beam body 1 to exhibit prestress, and through each post 53 through each post 53, a wire cable is inserted and embedded in both ends of the protective fence J. The protective fence J is strengthened by, for example, tying the wire cable to the fixed anchor to prevent falling rocks or avalanches.

29 shows a fitting portion 56 in which the height of the wooden beam 7 is increased and the laminated material is formed into a plate shape, and the cross-sectional area is reduced to be similar to the outer contour at both ends in the width direction. The insertion holes 2 are provided in five stages across the fitting portions 56, flanges 57 having the same width are provided around the entire circumference of the fitting portions 56 at both ends, respectively, and An end cap 59 in which a hole 58 having the same phase as that of the insertion hole 2 is provided in the web is fitted, and as shown in a partial diagram (a), the end cap 59 is inserted into the insertion hole 2 from one end side of each stage, 30 is a board body a in which nuts 6 are screwed and fastened to screwed portions 4 at both ends of a round steel bar 3 projected into a hole 58 on the other end side, and the one shown in FIG. A fitting part in which the height of the beam 7 is increased, a projecting part 60 is provided on one side of the upper and lower ends and is formed into a plate shape, and the cross-sectional area is reduced to a shape similar to the outer contour at both ends. 6, the insertion holes 2 are provided in five stages across both fitting portions, and both fitting portions are respectively provided with flanges 57 having the same cross section and the same width on the entire circumference. An end cap 61 having a hole 58 that is in phase with the hole 2 is fitted, and the nut is inserted into the threaded portion 4 of the round steel rod 3 that is inserted through the insertion hole 2 and protrudes from the hole 58 at both ends in the same manner as described above. 6 is screwed and fastened to form a board body b as shown in a partial diagram (a). Further, as shown in FIG. 31, the height of the wooden beam 7 is increased and the laminated material is formed into a plate shape in the same manner as described above, and a corrugated uneven portion 62 is formed on one surface thereof, and both ends in the width direction are formed. Is provided with a fitting portion 56 having a reduced cross-sectional area similar to the outer contour as described above, and the insertion holes 2 are provided in five stages as shown in a partial diagram (b) across both fitting portions 56, End caps in which both fitting portions 56 are respectively provided with flanges 57 having the same width and the same width as the corrugated surface on the entire circumference, and having a hole 58 in the same phase as the insertion hole 2 in the web. 63 is fitted, and the nut 6 is screwed and fastened to the threaded portion 4 of the round steel bar 3 which is inserted into the insertion hole 2 in the same manner as described above and protrudes from the hole 58 at both ends thereof, and is divided into parts (a). The board body c is formed as shown in FIG.
In the above-mentioned board bodies a to c, each board body a to c is formed by stacking the same divided plates (not shown) as the wooden beam 7 having a shape divided between the insertion holes 2 of each stage. Of course, this is possible, but when used as a floor slab, it is required that the laminates be joined closely.

Regarding the usage examples of the board bodies a to c thus configured, the usage example of the board body a will be described. As shown in FIG. 32, the board body a is used as a protective fence K for preventing falling rocks and falling snow. As shown in FIG. 33, the support column 53 erected on the retaining wall 52 shown in FIG. 33B has an I-shaped cross section and is arranged with spans in which both ends of the board body a are accommodated between the left and right inner grooves 64. Each produced board body a is installed in a labor-saving manner by a simple operation that can be accommodated between the pillars 53 in the field, and a head cap 55 is put on the top surface thereof as shown in a partial diagram (a) of FIG. A guard fence K is constructed. In addition, in each board body a thru | or c, if the front width dimension, height dimension, and depth (thickness) dimension are unified, it will have compatibility with the support column 53 erected on the retaining wall 52. It will be possible.
In addition, each board body a thru | or c is utilized also as a floor slab, and if it uses for the deck plate of the 2nd floor or more, a lower surface will become a ceiling material as it is.

  The guard fence according to the present invention is made of laminated timber with pre-stressed wooden beams. Expected to revitalize the timber industry and road construction industry.

The partial front view of the guard fence A. The top view of the state which removed the head cap 10 of FIG. It is explanatory drawing of the wooden beam 7, (a) is the top view, (b) is the front view. The partial front view of guard fence A1. It is explanatory drawing of a support | pillar, (a) is a perspective view of the support | pillar 8, (b) is a perspective view of the auxiliary support | pillar 12. The partial front view of the guard fence B. FIG. The top view of FIG. Explanatory part explanatory drawing which fractured | ruptured the principal part of the left end part of FIG. The partial enlarged front view of the left end part of FIG. It is explanatory drawing of the guard fence C, (a) is the partial front view, (b) is one side view in the case of an outside beam type, (c) is one side view in the case of a center beam type. FIG. 11 is an enlarged partial cross-sectional view in which a part of the left beam 7 in FIG. 10 is omitted. The partial expanded sectional view around the support | pillar 8 in the case of a center beam format. FIG. 5 is an explanatory plan view showing an embodiment of a beam 7. It is explanatory drawing of the guard fence D, (a) is the partial front view, (b) is one side view of the auxiliary | assistant support | pillar 25, (c) is one side view of the support | pillar 29. The expanded partial cross-sectional view of the left end part of FIG. It is explanatory drawing of the protection fence E, (a) is the partial front view, (b) is one side view of the principal part of the support | pillar 31, (c) is one side view of the principal part of the auxiliary | assistant support | pillar 32. FIG. 17 is an enlarged partial cross-sectional view in which a main part of the left end portion of FIG. 16 is broken, (a) is an end portion explanatory view, and (b) is an intermediate portion explanatory view. It is the partial explanatory view of the construction state of guard fence F, (a) is the partial front view, and (b) is one side view of the embedding state of support column 36. AA arrow sectional drawing of the support | pillar 36 of the fractional drawing (b) of FIG. FIG. 19 is an enlarged partial cross-sectional view in which a part of the beam 7 in FIG. 18 is omitted, in which (a) is an explanatory view of an end portion and (b) is an explanatory view of an intermediate portion. It is explanatory drawing of the guard fence G, (a) is the partial front view, (b) is the one side part longitudinal cross-sectional view which fractured | buried the embedding part of the support | pillar 44, (c) is the longitudinal cross-sectional view of the support | pillar 44. FIG. 22 is an enlarged partial cross-sectional view in which a part of the beam 7 in FIG. 21 is omitted. It is explanatory drawing of the outside beam format of the guard fence H, (a) is the partial front view, (b) is the one side view which fractured | ruptured the embedding part of the support | pillar 36. FIG. 24 is an enlarged partial cross-sectional view in which a part of the beam 7 in FIG. 23 is omitted. The partial front view for description of the protective fence I. FIG. 26 is an enlarged partial cross-sectional view in which a part of the beam 7 in FIG. 25 is omitted. It is explanatory drawing of the guard fence J, (a) is the partial front view, (b) is the partial longitudinal cross-sectional view of the one side part. FIG. 28 is an enlarged partial cross-sectional view in which a part of the beam 7 of FIG. 27 (a) is omitted. It is explanatory drawing of the board body a, (a) is the front view which fractured | ruptured the part, (b) is the right view. It is explanatory drawing of the board body b, (a) is the front view, (b) is the right view. It is explanatory drawing of the board body c, (a) is the front view, (b) is the right view. It is explanatory drawing of the guard fence K, (a) is the partial front view, (b) is the partial longitudinal cross-sectional view of the one side part. FIG. 33 is an enlarged partial cross-sectional view of FIG. 32 (a).

Explanation of symbols

1: Wooden beam body 2: Insertion hole 3: Round steel bar 4: Screwed part 5: End cap 6: Nut 7: Wooden beam 8: Post 9: Stepped part 10: Head cap 11: Winding sleeve 12: Auxiliary post 13 : Fitting groove 14: End cap 15: Web 16: Fastening bracket 17: Guide hole 18: Bracket 19: End cap 20: End cap 21: Large diameter ring 22: Bracket 23: Receptacle 24: End cap 25: Auxiliary support 26: concrete cast 27: anchor bolt 28: nut 29: support 30: end cap 31: support 32: auxiliary support 33: end cap 34: end cap 35: end cap 36: support 37: bracket 38: engagement fitting 39 : Core member 40: End cap 41: Nut 42: Head cap 43: Terminal cap 44: support 45: bracket 46: core member 47: end cap 48: end cap 49: spacer 50: bolt 51: terminal cap 52: retaining wall 53: support 54: end cap 55: head cap 56: fitting portion 57: Flange 58: Hole 59: End cap 60: Protruding portion 61: End cap 62: Concavity and convexity 63: End cap 64: Inner groove A to K: Guard fence a to c: Board

Claims (3)

In the protective fence formed by attaching a wooden beam between each support column erected in the required span, and inserting a reinforcing material into the wooden beam,
A protective fence in which the reinforcing material is a required number of tensile materials and each wooden beam is prestressed through tensioning means.   The guard fence according to claim 1, wherein each piece of the wooden beam disposed between the support columns is prestressed independently by the tensile material. The guard fence according to claim 1 or 2, wherein the wooden beam is made of laminated wood.

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