JP2017122329A - Flexible lattice panel, column connection structure and guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snow-resistant flexible lattice panel which can prevent strength from being insufficient with respect to the snow load, be constructed in a temporary installation manner and reduce the labor cost for the installation work, a column connection structure of the snow-resistant flexible lattice panel and a guard fence.SOLUTION: A flexible lattice panel in which members are connected so that the relative angle between the members can be changed includes: a pair of upper frame material 4 and lower frame material 5; a pair of right and left vertical frame materials 6, 7 whose upper and lower ends are axially-attached in a freely rotatable manner to the upper frame material 4 and the lower frame material 5; and a plurality of lattice materials 8 whose upper and lower ends are axially-attached in the freely rotatable manner to the upper frame material 4 and the lower frame material 5. A middle material 9 is inserted to the upper frame material 4, and the side surfaces of the pair of vertical frame materials 6, 7 are attached with connection metal fittings 61, 71 in a cross-sectional U shape connected in a manner of covering from above to a protruding metal fitting 22 provided in a protruding manner on the column 2 side face of the guard fence 1.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a protective fence provided with a flexible grid panel that can be installed even on sloping ground. It is related with the protective fence provided with the support | pillar connection structure which connects these, and those snow-resistant type free lattice panels and the support | pillar connection structure.

  2. Description of the Related Art Conventionally, a guard fence having a flexible grid panel that can be installed on an inclined ground is known. For example, Patent Document 1 discloses that a metal fitting 5 is interposed between upright columns 1 for the purpose of providing a pipe fence having a good appearance, as well as being applied to flat land such as roads and parks. The left and right frame pipes 8 and 9 to be attached, the upper and lower frame pipes 6 and 7 provided on the upper and lower sides of the left and right frame pipes 8 and 9, and the space in the upper and lower frame pipes 6 to 9 A pipe fence 2 composed of vertical pipes 10 provided in parallel to the frame pipes 8 and 9 at a predetermined interval, wherein the left and right frame pipes 8 and 9 and the vertical pipes 10 are connected to the pipe ends thereof. 3, and the connecting member 3 is loosely inserted into the openings 11 provided at predetermined intervals on the tube walls of the upper and lower frame pipes 6, 7, and the retaining members provided on the upper and lower frame pipes 6, 7 It is retained by the member 4 In addition, a pipe fence 2 connected to upper and lower frame pipes 6 and 7 is disclosed (claim 1 of claim 1 of patent document 1, paragraphs [0011] to [0019] of the specification, figure of drawings) 1, see FIG.

  However, in the pipe fence of Patent Document 1, the metal fitting 18 welded to the side surfaces of the left and right frame pipes 8 and 9 is fitted into the metal fitting 17 welded to the side surface of the support column 1 by moving in the horizontal direction. Since it is fixed by the pin 19 inserted in the direction, for example, a load applied to the fence body such as a snow load is transmitted as a shearing force to the metal fitting 18 and the metal fitting 17, and eventually the shearing force (supporting pressure) of the pin 19. There is a problem that the strength is insufficient when installed in heavy snow areas.

  Moreover, although the pipe fence of patent document 1 can deform | transform a frame body into a rhombus and can also be installed in sloping ground, the clearance gap between the metal fitting 17 of the support | pillar 1 and the metal fitting 18 of the frame pipes 8 and 9 is small, and it depends on construction error. There was a problem that it was not possible to absorb the difference in the mounting interval due to the expansion and contraction of the span between the columns and the mounting along the inclined surface.

  In addition, the pipe fence of Patent Document 1 is fitted to the metal fitting 17 attached to the side surface of the column 1 by moving the metal fitting 18 attached to the side surfaces of the left and right frame pipes 8 and 9 in the horizontal direction. Since it is pinned, it was impossible for one worker to temporarily place a fence panel between the columns, and there was a problem that it was uneconomical due to unnecessary labor costs for fence installation work.

  Further, in Patent Document 2, the vertical lattice is stably and firmly held between the upper and lower body edges by using the same type of interval holding material regardless of the thickness of the end portion of the vertical lattice, and the interval holding is performed. For the purpose of providing an assembling structure of a guard fence in which the trunk edges can be effectively assembled by the material, the guard fence 1 has a trunk edge 20 and a vertical lattice panel 30 that connects both the trunk edges 20. The trunk edge 20 includes a slit 21 s extending over the entire length, and a vertical lattice panel support portion 22 that expands in a reverse wedge shape from both edges of the slit 21 s toward the inside. It has the vertical lattice 31 arranged in parallel with the longitudinal direction of the edge 20, and the space | interval holding material 32 which hold | maintains the space | interval space | interval of the vertical lattice 31 at equal intervals. Further, the spacing member 32 includes a vertical lattice holding portion 32 a connected to the ends of the lattice 31 and a body edge engaging portion 32 b that engages with the vertical lattice panel support portion 22 in a wedge shape. For this reason, since the trunk edge engaging portion 32b of the spacing member 32 is pressed against the longitudinal lattice panel support portion 22 of the trunk edge 20 due to the load of the vertical grating panel 30, the spacing member 32 is separated from the trunk edge 20 by the wedge effect. An assembly structure of a protective fence is disclosed in which the body edge 20 is reinforced by the interval maintaining member 32 (claim 1 of patent document 2 and paragraphs [0018] to [0028] of the specification). , See FIG. 1 of the drawings).

  However, the assembly structure of the guard fence of Patent Document 2 can hold the vertical grid stably and firmly using the same type of spacing member regardless of the thickness of the end of the vertical grid, It is not capable of withstanding a load that acts directly on the trunk edge 20 such as a load, and is not taken into consideration, and there is a problem that the strength is insufficient when installed in a snowy area.

  Moreover, like the above-mentioned pipe fence of Patent Document 1, the assembly structure of the guard fence of Patent Document 2 is the difference in the mounting interval due to the expansion and contraction of the span between the columns due to the construction error and the diagonal mounting along the inclined surface. The problem that it cannot be absorbed and the problem that one person cannot perform temporary installation cannot be solved.

JP 2004-84379 A JP-A-2015-52252

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is not to be insufficient in strength against a snow load, and the expansion / contraction and inclination of the span between columns due to construction errors. To provide a universal grid panel, a flexible grid panel support structure, and a protective fence that can absorb the difference in mounting interval due to the installation, and can temporarily install and reduce the labor cost of installation work. is there.

  A universal lattice panel according to a first aspect of the present invention includes a pair of upper and lower upper frame members and a lower frame member, and a pair of left and right vertical frame members whose upper and lower ends are pivotally attached to the upper and lower frame members. A plurality of lattice members having upper and lower ends pivotably attached to the upper frame member and the lower frame member, and an intermediate member is inserted into the upper frame member, On the side surfaces of the pair of vertical frame members, there is attached a U-shaped connection fitting that covers and is connected to the protruding fitting protruding from the side of the column of the protective fence from above. To do.

  The flexible grid panel according to a second aspect of the present invention is the first aspect of the present invention, wherein the height of the middle member reaches from the vicinity of the upper end to the vicinity of the lower end of the inner surface of the upper frame member, and the upper and lower edges thereof are the upper frame. It is bent at an acute angle along the inner surface of the material.

  According to a third aspect of the present invention, in the first or second invention, the connection bracket includes a column connection long hole through which a connecting member such as a bolt or a rivet is inserted to connect to the protruding bracket. The column connection long hole is provided in the up-down direction and is elongated in the fence width direction perpendicular to the axis of the vertical frame member.

  The universal lattice panel according to a fourth aspect of the present invention is the invention according to any one of the first to third aspects, wherein the upper frame member, the lower frame member, and the vertical frame member are joined together by an upper end of the vertical frame member. And a frame connection long hole drilled in the vicinity of the lower end, the frame connection long hole is elongated in the fence width direction orthogonal to the axis of the vertical frame member, and both end portions of the middle member Is characterized in that a round hole is formed, and a connecting member such as a bolt or a rivet is inserted into the round hole, and the upper frame member is fixed to the vertical frame member.

  A universal lattice panel according to a fifth aspect of the present invention is the invention according to any one of the first to fourth aspects, wherein the connection fitting is welded to the vertical frame member, and the weld line is in the axial direction of the vertical frame member. The linear part along the length is longer than the other parts.

  A column connection structure for a flexible grid panel according to a sixth aspect of the present invention is a column connection structure between a plurality of columns and a flexible grid panel that is stretched between the columns and connected so that the relative angle between members can be changed. The free lattice panel includes a pair of upper and lower upper frame members and a lower frame member, a pair of left and right vertical frame members pivotally mounted on the upper and lower frame members, and the upper and lower frames. A plurality of lattice members having upper and lower ends pivotally attached to the frame member and the lower frame member, and a protruding metal fitting connected to the universal lattice panel protrudes from a side surface of the support column. In the upper frame member, an intermediate member is inserted, and the side surfaces of the pair of vertical frame members are formed in a U-shaped cross-section for covering and connecting the protruding metal fittings from above. The connection metal fitting is projected.

  According to a seventh aspect of the present invention, there is provided a column connection structure for a flexible grid panel according to the sixth aspect, wherein the connection fitting has a column connection long hole through which a connecting member such as a bolt or a rivet is inserted to connect to the protruding fitting. The column connection long hole is provided in the up-down direction and is elongated in the fence width direction perpendicular to the axis of the vertical frame member.

  According to an eighth invention, in the sixth or seventh invention, the universal grid panel support connection structure is a panel in which a connecting member such as a bolt or a rivet for connecting to the connection fitting is inserted into the protruding fitting. A connection long hole is provided, and the panel connection long hole is opened in the vertical direction and is elongated in the fence width direction perpendicular to the axis of the support column.

  According to a ninth aspect of the present invention, there is provided the column connection structure for the flexible grid panel according to any one of the sixth to eighth aspects, wherein the upper frame member, the lower frame member, and the vertical frame member are joined together by the vertical frame member. It is connected through a frame connection long hole drilled in the vicinity of the upper end and the lower end of the frame member, and this frame connection long hole is elongated in the fence width direction perpendicular to the axis of the vertical frame member. To do.

  The support structure for a flexible grid panel according to a tenth aspect of the present invention is the ninth aspect of the invention, wherein a round hole is formed at both ends of the intermediate member, and a connecting member such as a bolt or a rivet is inserted into the round hole. In addition, the upper frame member is fixed to the vertical frame member.

  According to an eleventh aspect of the present invention, there is provided a support structure for a snow-resistant flexible grid panel according to any one of the sixth to tenth aspects, wherein the connection fitting is welded to the vertical frame member, and the protruding fitting is It is welded to the support | pillar, and as for any welding line, the linear part along the axial direction of the said vertical frame material or the said support | pillar is longer than the other part, It is characterized by the above-mentioned.

  A protection fence according to a twelfth aspect of the present invention is a protection fence that prevents crossing or falling, and the snow-resistant flexible lattice panel according to any one of claims 1 to 5 is a universal fence according to any one of claims 6 to 11. It is connected to the column by a column panel column connection structure.

  According to the first to twelfth inventions, the upper frame member is provided with the intermediate member for imparting the bending strength capable of withstanding the snow load, so that the bending strength is improved by the intermediate member and the snow load is increased. However, the strength will not be insufficient. Further, according to the first to twelfth inventions, the side surfaces of the pair of vertical frame members are U-shaped cross-sections that are connected by covering the protruding metal fittings protruding from the side surfaces of the support fence columns from above. Therefore, it is possible to perform the panel installation work by one worker by temporarily placing the free lattice panel on the protruding metal fitting of the support column. For this reason, the labor cost of panel installation work can be reduced.

  In particular, according to the second invention, the height of the intermediate material reaches from the vicinity of the upper end of the inner surface of the upper frame member to the vicinity of the lower end, and the upper and lower edges thereof are bent at an acute angle along the inner surface of the upper frame member. Therefore, in the upper frame material, the cross-section of the medium material can be concentrated at a distance from the neutral axis, and the cross-sectional secondary moment and the cross-section coefficient can be improved to reduce the weight. it can. For this reason, bending strength can be improved further and the intensity | strength with respect to a snow load can be ensured.

  In particular, according to the third and seventh inventions, the column connection long hole is a long hole in the fence width direction, so the difference in mounting interval due to the inclination when installed on an inclined land and when installed on a flat ground is Can be absorbed. Similarly, according to the eighth invention, since the panel connection long hole is a long hole in the fence width direction, the difference in the mounting interval due to the inclination can be further absorbed.

  In particular, according to the fourth and ninth inventions, the frame connection long holes provided in the vicinity of the upper and lower ends of the vertical frame material are long holes in the fence width direction. Can be absorbed.

  In particular, according to the fifth and eleventh inventions, since the vertical frame material of the weld line or the linear part along the axial direction of the support column is longer than the other parts, the snow load is the vertical frame material of the vertical frame material. Even when acting as an axial force, the vertical frame material of the weld line or the linear part along the axial direction of the column only acts as a shearing force according to the axial force, and the bending moment about the weld line As described above, the axial force is amplified and transmitted to the welded portion by the principle of soot as much as possible. For this reason, the possibility that stress concentrates on the welded portion, which is a weak point in strength, can be reduced, and the strength against snow load can be further improved.

  In particular, according to the tenth aspect of the present invention, since the intermediate material inserted into the upper frame material for the purpose of reinforcing the bending strength is provided with only a small-diameter round hole, not a long hole, as a hole that becomes a cross-sectional defect. Further, the bending strength can be further improved to ensure the strength against the snow load.

It is a front view which shows the state which looked at the protection fence which concerns on embodiment of this invention in the horizontal direction orthogonal to a fence width direction. It is a perspective view which shows the upper part of the support | pillar of a protection fence same as the above. It is a front view which shows the state which installed the support | pillar same as the above on the ground. It is a front view which shows the snow-resistant type | mold flexible lattice panel which is a flexible lattice panel which concerns on embodiment of this invention. It is a partial expansion perspective view which shows the right end of the upper frame material of a snow-resistant type free lattice panel same as the above. It is sectional drawing which shows the state which cut | disconnected the upper frame material and middle material of the snow-resistant type free lattice panel same as the above by the plane orthogonal to an axis | shaft. It is a front view which shows an upper frame material same as the above by omitting intermediate. It is a partial expansion perspective view which shows the right end of the lower frame material of a snowproof type free lattice panel same as the above. It is sectional drawing which shows the state which cut | disconnected the lower frame material and middle material of the snow-resistant type free lattice panel same as the above by the plane orthogonal to an axis | shaft. It is a partial expansion perspective view which shows the right end of the middle material of a snow-resistant type | mold free lattice panel same as the above. It is a front view which shows an intermediate material same as the above by the middle omission. It is a perspective view which shows the upper part of the vertical frame material of a snow-resistant type free lattice panel same as the above. It is a figure which shows a vertical frame material same as the above, (a) is a right view, (b) is a front view. It is a top view which shows a vertical frame material same as the above. It is a perspective view which shows the upper part of the grating | lattice material of a snow-resistant type free grating panel same as the above. It is a figure which shows a lattice material same as the above, (a) is a right view, (b) is a front view. It is explanatory drawing which shows the temporary placement construction to the support | pillar of a snow-resistant type free lattice panel same as the above with a perspective view.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a guard fence according to an embodiment of the present invention, a flexible lattice panel thereof, and a column connection structure of the flexible lattice panel will be described in detail with reference to the drawings.

  As shown in FIG. 1, a protective fence 1 according to an embodiment of the present invention includes a plurality of support columns 2 and a snow-resistant mold that is a free lattice panel according to an embodiment of the present invention that is stretched between these support columns 2. It is comprised from the lattice panel 3 grade | etc.,.

(Support)
As shown in FIG. 2 and FIG. 3, the column 2 includes a column main body 20 made of a circular steel pipe, a cap 21 that closes the upper end opening of the column main body 20, and left and right two steps up and down from the side peripheral surface of the column main body 20. It is comprised from the protrusion metal fitting 22 etc. which protruded in the (horizontal direction).

  This strut body 20 is a steel pipe (t = 3.2mm), diameter (φ = 60.5mm), height 1300mm made of general structural carbon steel pipe (STK400 Z27), and the root is embedded in the foundation about 200mm. As a result, the ground part becomes a column main body with a height of 1100 mm.

  The cap 21 is a steel dome-shaped member, is closed so that the tube end of the column main body 20 is not exposed, prevents a person from being injured by a sharp cut surface, and rainwater on the end surface and the inner surface. It has a function to prevent rusting and prevent rusting.

  The protruding metal fitting 22 is a metal fitting formed by bending a steel plate having a plate thickness (t = 3.2 mm) and a width of 35 mm to form a panel connection long hole 23 for connecting a snow-resistant flexible lattice panel 3 described later. . This panel connection long hole 23 is 14 mm × 25 mm long in the fence width direction X (pointing along the line connecting the centers of the columns 2, the same applies hereinafter) perpendicular to the axis of the column 2 that opens in the vertical direction. It is a long hole.

  The protruding metal fitting 22 is configured to have a height of 193 mm and 828 mm from the upper end of the column main body 20 and with the end surface of the steel plate abutting the side peripheral surface of the column main body 20 without providing a groove. Both sides of the surface of the steel sheet to be welded are welded by fillet welding. That is, the weld line in which the projecting metal fitting 22 is welded to the column main body 20 has a linear shape along the axial direction of the column main body 20.

  For this reason, even when snow accumulates on the snow-resistant flexible grid panel 3 connected to the projecting fitting 22, the snow load does not act as a bending moment on the weld line, but only as a shearing force along the weld line. Does not work. Therefore, the snow load is not amplified and transmitted by the principle of dredging, unlike the bending moment about the weld line, and the risk of stress concentration on the welded part, which is weak in strength, is reduced. Strength against load can be improved.

  In addition, as an example of the support column 2 according to the embodiment of the present invention, the intermediate support column in which the protruding metal fittings 22 are protruded on both sides of the fence width direction X has been described. Naturally, the protruding fitting 22 is protruded only on one side in the fence width direction X.

<Free lattice panel>
As shown in FIG. 4, a snow-resistant type free lattice panel 3 that is a free lattice panel according to an embodiment of the present invention includes a pair of upper and lower upper frame members 4 and 5, and the upper frame member 4 and lower frame member. A pair of left and right vertical frame members 6, 7 pivotally mounted on the upper and lower ends of the frame 5, and a plurality of lattices whose upper and lower ends are pivotally mounted on the upper frame member 4 and the lower frame member 5. The material 8 is made up of.

(Upper frame material, lower frame material)
The upper frame material 4 and the lower frame material 5 are bent from a hot-dip galvanized steel sheet (SGC400-ZSMO Z27) as shown in FIGS. 8 is a strip having a length of 1880 mm, in which grooves 4a and 5a that are inserted through the end portions of FIG. The upper frame member 4 is installed along the upper end of the protective fence 1 with the horizontal direction as the longitudinal direction, and also functions as a handrail headboard.

  In addition, round holes 4b, 4c, 5b, and 5c each having a height of 14 mm and a width of 16 mm and being slightly lateral (fence width direction X) are formed at both ends of the upper frame member 4 and the lower frame member 5. . These round holes 4b, 4c, 5b, and 5c are inserted through connecting members, which are M12 bolts, so that the vertical frame members 6 and 7 are rotatably connected (swingable). For this reason, the relative angles of the upper frame member 4 and the lower frame member 5 and the vertical frame members 6 and 7 can be changed, and it is easy to follow the slope of the sloping ground.

  Of course, the connecting member is not limited to the M12 bolt, and may be any connecting member that rotatably connects other bolts, pins, rivets, and the like.

  In addition, unlike the upper frame material 4, four drain holes (not shown) with a diameter of 500 mm are provided on the bottom surface of the lower frame material 5 in order to drain rainwater and the like that has entered from the groove 5 a. Has been.

(Medium)
As shown in FIGS. 6 and 9, a pair of left and right middle members 9 and 9 ′ are inserted in the upper frame member 4 and the lower frame member 5 in order to ensure bending strength that can withstand snow load. . As shown in FIGS. 10, 6, and 9, the intermediate members 9 and 9 are bent from a hot-dip galvanized steel sheet (SGC400-ZSMO Z27) having a thickness of 2.3 mm, and the upper edges 9a and 9a ′ thereof. The lower edge portions 9 b and 9 b ′ are bent at an acute angle along the inner surfaces of the upper frame member 4 and the lower frame member 5.

  Further, as shown in FIGS. 6 and 9, the middle members 9 and 9 ′ are warped at a receding distance of about 2 mm and an angle of 161 ° at the center of the cross section slightly below, and the upper plate surface is the upper frame member 4 or the lower portion. It is flush with the inner surfaces of the grooves 4a, 5a of the frame member 5.

  For this reason, the total height of the intermediate members 9 and 9 ′ is 43 mm reaching from the vicinity of the upper ends of the inner surfaces of the upper frame member 4 and the lower frame member 5 to the vicinity of the lower end thereof, and the axial direction (longitudinal direction of the intermediate members 9 and 9 ′ In the cross section perpendicular to the direction), the upper edge portions 9a and 9a 'and the lower edge portions 9b and 9b' are positioned away from the neutral axis, and the cross-sectional secondary moment and the cross-section coefficient are improved to reduce the weight. be able to. Therefore, the bending strength of the middle member 9, the upper frame member 4, and the lower frame member 5 can be improved to ensure the strength against the snow load.

  In addition, at both ends of the middle member 9, 9 ', a height of 14 mm x at positions corresponding to the round holes 4b, 4c, 5b, 5c drilled at both ends of the upper frame member 4 and the lower frame member 5, respectively. Long circular holes 90 and 90 'having a width of 20 mm are formed on the side (rail width direction X). The above-described M12 bolts are inserted into the round holes 90 and 90 ', and the vertical frame members 6 and 7 are rotatably fixed.

  Further, 11 pin holes 91 and 91 ′ having a diameter of 5.5 mm for pinning (riveting) the lattice material 8 at a pitch of 158 mm are formed in the intermediate members 9 and 9 ′.

  As described above, in view of the fact that the intermediate material 9, 9 'is a reinforcing material that reinforces the bending strength and increases the rigidity, the hole in the intermediate material 9, 9' has a small diameter as much as possible so as not to cause a cross-sectional defect. For this reason, desired strength and rigidity can be secured to the upper frame member 4 and the lower frame member 5 even with a snow load, and the vertical frame members 6 and 7 and the lattice member 8 to be connected can be securely held.

(Vertical frame material)
The vertical frame members 6 and 7 are arranged at heights corresponding to the vertical frame main bodies 60 and 70 made of steel pipes and the above-described protruding fittings 22 from the side peripheral surfaces of the vertical frame main bodies 60 and 70 outside the fence width direction X. It is comprised from the connection metal fittings 61 and 71 etc. which protruded toward.

  The vertical frame bodies 60 and 70 are steel pipes having a tube thickness (t = 2.3 mm), a diameter (φ = 34 mm), and a total height of 925 mm made of a general structural carbon steel pipe (STK400 ZSMO Z27), and an upper end portion 60a of the pipe. 70a and the lower end portions 60b and 70b are flattened by being flattened by about 61 mm in length.

  The flat upper end portions 60a, 70a and lower end portions 60b, 70b are inserted into the frame connecting long holes 60c, 70c, 60d through which the M12 bolts for connecting to the upper frame member 4 or the lower frame member 5 are inserted. 70d is drilled. These frame connection long holes 60c, 70c, 60d, and 70d are long holes with a height of 14 mm and a width of 35 mm that are long in the fence width direction X orthogonal to the axes of the vertical frame members 6 and 7.

  For this reason, by adjusting the bolting position in the width direction of the frame connecting long holes 60c, 70c, 60d, 70d which are long holes, the expansion / contraction of the span between the columns due to construction errors, that is, the column 2 It is possible to absorb the difference in length between the columns caused by the error in the installation position and the vertical accuracy of the column 2.

  The connection fittings 61 and 71 are steel members having a U-shaped cross section with an opening having a height of 38.2 mm, an overall width of 36.7 mm, and an overall length of 53.8 mm. As shown in FIG. 12, the connection fittings 61 and 71 are welded by flare welding only on both side portions having a U-shaped cross section, with grooves provided on the side circumferential surfaces of the vertical frame bodies 60 and 70. ing. That is, the weld line in which the connection fittings 61 and 71 are welded to the vertical frame main bodies 60 and 70 is a straight line along the axial direction of the vertical frame main bodies 60 and 70.

  For this reason, even when snow accumulates on the snow-resistant type free lattice panel 3, the snow load does not act as a bending moment on the weld line, but acts only as a shearing force along the weld line. Therefore, the snow load is not amplified and transmitted by the principle of dredging, unlike the bending moment about the weld line, and the risk of stress concentration on the welded part, which is weak in strength, is reduced. Strength against load can be improved.

  Of course, arc-shaped portions where the upper surfaces of the connection fittings 61 and 71 are in contact with the side peripheral surfaces of the vertical frame main bodies 60 and 70 may be welded by flare welding or the like according to the design strength. However, since the arc-shaped portion is not subjected to flare welding, it is not necessary to provide a curved groove or the like, so that the processing cost can be reduced.

  Further, column connection elongated holes 61 a and 71 a for connecting to the protruding metal fitting 22 of the column 2 are formed on the upper surfaces of the connection brackets 61 and 71 having a U-shaped cross section. The column connection long holes 61a and 71a are long holes extending in the vertical direction and having a width of 14 mm and a length of 25 mm and extending in the fence width direction X. For this reason, combined with the long hole of the panel connection long hole 23 of the above-described protruding fitting 22, absorbs the difference in the mounting interval of the snow-resistant flexible grid panel 3 due to the inclination when installed on an inclined ground and when installed on a flat ground. Can do.

(Lattice material)
The lattice material 8 is a steel pipe having a tube thickness (t = 1.0 mm), a diameter (φ = 19.1 mm), and an overall height of 931 mm made of a general structural carbon steel pipe (STK400 ZSMO Z27). 8b is crushed and flattened by about 64 mm in length.

  The flat upper end 8a and lower end 8b have a total of four pin holes 8c to 8f each having a diameter of 6 mm for riveting to the pin holes 91 and 91 'of the intermediate member 9 and 9'. It has been drilled.

  Thus, since the lattice material 8 is rivet-bonded to the intermediate materials 9 and 9 ′ by the pin holes 8c to 8f, the lattice material 8 is pivotally attached to the upper frame material 4 and the lower frame material 5. The hole is not drilled. For this reason, it can reduce that rust generate | occur | produces and corrodes in the end surface of steel materials by the penetration | invasion of rainwater from a through-hole.

<Temporary placement construction>
Next, with reference to FIG. 1 and FIG. 17, the temporary placement of the guard fence according to the embodiment of the present invention, the snow-resistant free lattice panel, and the support connection structure of the snow-resistant free lattice panel will be described in detail. When installing the protective fence 1 which concerns on embodiment of this invention, first, while supporting the support | pillar 2 perpendicularly | vertically on the ground, the snow-resistant type free lattice panel 3 is assembled.

  Then, the connection fittings 61 and 71 projecting outward from the fence width direction X of the assembled snow-resistant free lattice panel 3 are placed on the projection fitting 22 between the columns 2 to be installed and temporarily placed. At this time, since the connection fittings 61 and 71 have a U-shaped cross-section opening downward, the protruding metal fitting 22 made of a bent steel plate has a U-shaped cross-section on each side of the snow-resistant flexible lattice panel 3. Since the temporary connection can be performed simply by fitting the respective connection fittings 61 and 71, it can be easily performed by one worker.

  In addition, since the connection fittings 61 and 71 have a U-shaped cross-section that opens downward, the temporarily placed snow-resistant flexible grid panel 3 may be shifted or dropped depending on the wind or the inclination angle. There are few, and it can stop easily with connection members, such as a volt | bolt.

<Operational effects of the protective fence according to the embodiment>
According to the protective fence 1 according to the embodiment described above, its snow-resistant free lattice panel 3, and the strut connection structure of the snow-resistant free lattice panel, the upper frame member 4 and the lower frame member 5 are paired with the middle members 9 and 9. Since 'is inserted, the bending strength is improved by the intermediate members 9, 9', and the strength is not insufficient even for a snow load. Further, as described above, the snow-resistant flexible grid panel 3 can be temporarily placed on the protruding metal fitting 22 of the support column 2 so that the panel installation work can be performed by one worker alone. For this reason, the labor cost of panel installation work can be reduced.

  In addition, since the column connection long holes 61a and 71a and the panel connection long hole 23 are long holes in the fence width direction X, the snow-resistant free-lattice panel 3 due to the inclination when installed on an inclined ground and when installed on a flat ground. The difference in the mounting interval can be absorbed.

  And since the frame connection long holes 60c, 70c, 60d, and 70d of the vertical frame members 6 and 7 are long holes in the fence width direction X, the expansion and contraction of the span between the columns due to construction errors can be absorbed. .

  As described above, the protective fence according to the embodiment of the present invention, the snow-resistant type free lattice panel, and the support connection structure of the snow-resistant type free lattice panel have been described in detail. However, the technical scope of the present invention should not be construed in a limited manner.

1: Guard fence 2: Prop 20: Prop body 21: Cap 22: Protrusion fitting 23: Panel connection slot 3: Snow-resistant free lattice panel (universal lattice panel)
4: Upper frame material 5: Lower frame materials 4a, 5a: Grooves 4b, 4c, 5b, 5c: Round holes 6, 7: Vertical frame materials 60, 70: Vertical frame bodies 60a, 70a: Upper end portions 60b, 70b: Lower ends Portions 60c, 60d, 70c, 70d: frame connection long holes 61, 71: connection fittings 61a, 71a: strut connection long holes 8: lattice material 8a: upper end 8b: lower end 8c, 8d, 8e, 8f: pin hole 9 , 9 ′: Middle material 9a, 9a ′: Upper edge portion 9b, 9b ′: Lower edge portion 90, 90 ′: Round hole 91, 91 ′: Pin hole

Claims (12)

A pair of upper and lower upper frame members, a lower frame member, a pair of left and right vertical frame members pivoted pivotally on the upper and lower frame members, the upper frame member and the lower frame member And a plurality of lattice members having upper and lower ends pivotally mounted thereto,
In the upper frame material, while an intermediate material is inserted,
On the side surfaces of the pair of vertical frame members, there is attached a U-shaped connection fitting that covers and is connected to the protruding fitting protruding from the side of the column of the protective fence from above. Free lattice panel. The height of the intermediate material extends from near the upper end of the inner surface of the upper frame material to near the lower end, and upper and lower edges thereof are bent at an acute angle along the inner surface of the upper frame material. The free lattice panel according to claim 1. The connection bracket is provided with a column connection long hole through which a connecting member such as a bolt or a rivet for connecting to the projecting metal fitting is inserted. The flexible grid panel according to claim 1, wherein the flexible grid panel is long in a fence width direction perpendicular to the axis of the frame member. The rolling of the upper frame member, the lower frame member, and the vertical frame member is connected through frame connection elongated holes formed near the upper and lower ends of the vertical frame member. , And is elongated in the fence width direction orthogonal to the axis of the vertical frame material,
Round holes are drilled in both ends of the intermediate material,
4. The free lattice panel according to claim 1, wherein a connecting member such as a bolt or a rivet is inserted into the round hole, and the upper frame member is fixed to the vertical frame member. . The connection fitting is welded to the vertical frame member, and the weld line has a linear portion along the axial direction of the vertical frame member that is longer than the other portions. 5. The free lattice panel according to any one of 4 to 4. A strut connection structure between a plurality of struts and a flexible lattice panel stretched between the struts and connected so that the relative angle between members can be changed,
The free lattice panel includes a pair of upper and lower upper frame members and a lower frame member, a pair of left and right vertical frame members pivotally mounted on the upper frame member and the lower frame member, and the upper frame. A plurality of lattice members having upper and lower ends pivotally attached to the material and the lower frame member,
On the side surface of the support column, a protruding metal fitting connected to the flexible grid panel is protruded,
In the upper frame material, while an intermediate material is inserted,
The side connection of the pair of vertical frame members has a U-shaped connection fitting protruding from above to connect to the protruding fitting from above. Construction. The connection fitting is provided with a column connection long hole through which a connecting member such as a bolt or a rivet for connecting to the protruding fitting is inserted,
7. The strut connection structure for a flexible grid panel according to claim 6, wherein the strut connection long hole is opened in the vertical direction and is elongated in the fence width direction orthogonal to the axis of the vertical frame member. The projecting metal fitting is provided with a panel connection elongated hole through which a connecting member such as a bolt or a rivet for connecting to the connection metal fitting is inserted,
The strut connection structure for a flexible grid panel according to claim 6 or 7, wherein the panel connection long hole is opened in the vertical direction and is elongated in the fence width direction orthogonal to the axis of the strut. The rolling of the upper frame member, the lower frame member, and the vertical frame member is connected through frame connection elongated holes formed near the upper and lower ends of the vertical frame member. The column connection structure for a flexible grid panel according to any one of claims 6 to 8, wherein the structure is elongated in a fence width direction orthogonal to the axis of the vertical frame member. Round holes are drilled in both ends of the intermediate material,
The strut connection structure for a flexible grid panel according to claim 9, wherein a connecting member such as a bolt or a rivet is inserted into the round hole, and the upper frame member is fixed to the vertical frame member. The connection fitting is welded to the vertical frame member, the projecting fitting is welded to the support column, and each welding line has a linear portion along the axial direction of the vertical frame member or the support column. The column connection structure for a flexible grid panel according to any one of claims 6 to 10, wherein the column connection structure is longer than other portions. A protective fence that prevents crossing and falling,
A snow fence type flexible grid panel according to any one of claims 1 to 5 is connected to a column by the column connection structure of the universal grid panel according to any one of claims 6 to 11.

Images