Frame and fence installation structure

Abstract

The present invention provides a frame for erecting a fence over a ditch, and a fence installation structure, etc. [Solution] A metal frame 10 for erecting a fence 20 having support posts 201 on a groove 30 comprises a plate-shaped base member 1, a sheath pipe 2 fixed to one plate surface of the base member 1 for holding the support posts 201, and a leg portion 31 that protrudes columnarly from the other plate surface of the base member 1 and prevents the fence 20 from tipping over by contacting the inner wall 301 of the groove 30. The leg portion 31 is detachably fixed to the base member 1.

Description

[Technical Field]

[0001] The present invention relates to a gantry and a fence installation structure. [Background Art]

[0002] Fences are sometimes installed as temporary enclosures at the boundary of a construction site. A fence is formed by providing a mesh-shaped or plate-shaped face material between a pair of support posts. As a method for erecting a fence, it is known to use a metal gantry having a cylindrical body provided on a base plate to allow the fence to stand on its own.

[0003] For example, Patent Document 1 discloses a support holder having a cylindrical portion provided on the upper surface of a base plate. By inserting the support post of the fence into the cylindrical portion of the support holder and holding the support post by the cylindrical portion, the fence can be made to stand on its own.

[0004] Patent Document 2 also discloses a fence fitting having a cylindrical body provided on a base plate. By inserting the cylindrical body of the fence fitting into the inner side of the cylindrical support leg of the fence and holding the support leg by the cylindrical body, the fence can be made to stand on its own. [Prior Art Documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent No. 5380273 [Patent Document 1] Japanese Patent No. 2893523 [Summary of the Invention] [Problem to be Solved by the Invention]

[0006] When there are ditches or other drainage channels in the area where a fence is to be installed, the method of erecting the fence becomes a challenge. For example, if the base plate is placed so as to straddle the ditch, it will lack stability and may easily tip over due to external forces such as strong winds. Fences are often installed along the edge of roads, and if they fall towards the road, there is a risk of accidents.

[0007] This invention has been made in view of the above-mentioned problems, and aims to provide a frame and fence installation structure for erecting a fence on a ditch. [Means for solving the problem]

[0008] The first invention for solving the above problems is a metal frame for erecting a fence having posts on a groove, comprising: a plate-shaped base member; a holding member fixed to one plate surface of the base member for holding the posts; and legs protruding columnarly from the other plate surface of the base member and contacting the inner wall of the groove to prevent the fence from tipping over, wherein the legs are detachably fixed to the base member.

[0009] In this invention, when erecting a fence over a groove using a support frame, the legs of the frame are inserted into the groove. The support frame prevents the fence from tipping over because its legs abut against the inner wall of the groove, improving the stability of the fence even when erecting it over a groove. The legs can also be removed from the base member, and the support frame can be used to erect a fence in a location without a groove after the legs have been removed. Furthermore, the legs can be replaced to match the depth and width of the groove.

[0010] It is preferable that the legs are provided on one inner wall side and the other inner wall side of the opposing inner walls of the groove. As a result, when the fence is about to tip over due to an external force, the legs will come into contact with one of the inner walls of the groove and catch on that inner wall, thereby preventing the fence from tipping over.

[0011] It is desirable that multiple sets of legs be provided at intervals in the direction of extension of the groove, with the leg on one inner wall side and the leg on the other inner wall side forming a set of legs. This improves the stability of the fence. Furthermore, it prevents the support structure from rotating on a flat surface when it is installed in a groove, thus fixing its position.

[0012] It is desirable that the end of the leg on one inner wall side that is on the base member side and the end of the leg on the other inner wall side that is on the base member side are connected by a connecting member, and that the connecting member be detachably fixed to the base member. The legs are connected by a connecting member, which allows the member to resist the force applied to the legs from the inner wall of the groove. The connecting member can also be used as a fixing part to secure the legs to the base member.

[0013] It is preferable that the base member be a checker plate. This adds an anti-slip function to the base material, ensuring the safety of pedestrians while walking.

[0014] The second invention is a fence installation structure in which a fence is erected on a groove using the frame of the first invention, characterized in that the legs of the frame are inserted into the groove, the base member is positioned to straddle the groove, and the support posts of the fence are held by the holding member. [Effects of the Invention]

[0015] The present invention provides a frame and fence installation structure for erecting a fence over a ditch. [Brief explanation of the drawing]

[0016] [Figure 1] A diagram showing fence installation structure 100. [Figure 2] A diagram showing fence installation structure 100. [Figure 3] A perspective view showing the support frame 10. [Figure 4] An exploded perspective view showing the gantry 10. [Figure 5] A view showing the base member 1a. [Figure 6] A view showing the gap-filling material 7. [Figure 7] A view showing the overturn prevention member 3a. MODE FOR CARRYING OUT THE INVENTION

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0018] (1. Fence installation structure 100) FIG. 1 and FIG. 2 are views showing a fence installation structure 100 in which a fence 20 is erected above a groove 30 using the gantry 10 according to an embodiment of the present invention. FIG. 1 is a view of the fence installation structure 100 seen from the extending direction of the groove 30, and FIG. 2 is a view of the fence installation structure 100 of FIG. 1 seen from the direction indicated by arrow A. The extending direction of the groove 30 corresponds to the direction normal to the paper surface of FIG. 1 and the left-right direction of FIG. 2.

[0019] The gantry 10 is a metal member used for erecting the fence 20 above the groove 30. Details of the gantry 10 will be described later.

[0020] The fence 20 is a gate-shaped member in which face materials 202a and 202b are provided between a pair of support posts 201. A plurality of the fences 20 are arranged side by side in the extending direction of the groove 30.

[0021] The support posts 201 are cylindrical members made of steel pipes or the like. The face material 202a is a net-like member made of metal wires such as wires, and the face material 202b is a plate-like member made of a metal plate or the like. However, the shapes, materials, and the like of the support posts 201 and the face materials 202a and 202b are not particularly limited.

[0022] The groove 30 is, for example, a roadside ditch and is installed at the boundary between the construction site and the road. However, the use and installation location of the groove 30 are not particularly limited. The groove 30 has a pair of inner walls 301 facing each other in the groove width direction. The groove width direction is perpendicular in plane to the extension direction of the groove 30 and corresponds to the left-right direction in Figure 1 and the plane normal direction in Figure 2.

[0023] (2. Stand 10) The support frame 10 includes a base member 1, a sheath pipe 2, an anti-tipping member 3, etc. Figure 3 is a perspective view showing the support frame 10. In Figure 3, the position of the groove 30 is indicated by a dashed line. Figure 4 is an exploded perspective view showing the support frame 10 from Figure 3.

[0024] The base member 1 is a plate-shaped metal member, and steel plate is used. The plane of the base member 1 is rectangular. However, the planar shape of the base member 1 is not particularly limited. The base member 1 is positioned so as to straddle the groove 30.

[0025] The sheath pipe 2 is a retaining member for holding the support post 201 of the fence 20. The sheath pipe 2 is a cylindrical metal member, and a steel pipe is used. The sheath pipe 2 is fixed to one of the plate surfaces, i.e., the upper surface, of the base member 1 by welding or the like. Note that the plate surface refers to the two surfaces with the largest area of ​​the plate-shaped member.

[0026] The sheath tube 2 is provided approximately in the center of the upper surface of the base member 1. In this embodiment, two sheath tubes 2 are arranged side by side in the direction of extension of the groove 30. As shown in Figure 2, multiple fence posts 201 adjacent to each other in the direction of extension of the groove 30 are inserted into the sheath tube 2, thereby holding the posts 201 in place.

[0027] The anti-tipping member 3 is provided on the other plate surface, i.e., the lower surface, of the base member 1. The anti-tipping member 3 is inserted into the groove 30. The anti-tipping member 3 has a pair of legs 31 that are spaced apart in the groove width direction, and a connecting member 32 that connects the pair of legs 31 together.

[0028] Multiple anti-tipping members 3 are provided at intervals in the direction of extension of the groove 30. That is, multiple sets of the above-mentioned leg portions 31 are provided at intervals in the direction of extension of the groove 30. In this embodiment, two anti-tipping members 3 are provided at intervals in the direction of extension of the groove 30.

[0029] The leg portion 31 is a metal member that protrudes columnarly from the lower surface of the base member 1. An angle material with an L-shaped cross-section is used for the leg portion 31.

[0030] One leg 31 of the anti-tipping member 3 is located on one inner wall 301 side of the groove 30, and the other leg 31 is located on the other inner wall 301 side of the groove 30. The length of the anti-tipping member 3 in the groove width direction is slightly smaller than the width of the groove 30.

[0031] The connecting member 32 is a metal member arranged along the groove width direction and is provided to connect the upper ends of the pair of legs 31, i.e., the ends on the base member 1 side. The connecting member 32 is made of an angle material having an L-shaped cross-section, and the portion corresponding to one side of the cross-section becomes the horizontal portion 321 arranged along the lower surface of the base member 1. Both ends of the connecting member 32 in the groove width direction are fixed to the upper ends of the pair of legs 31 by welding or the like.

[0032] The anti-tipping member 3, consisting of legs 31 and connecting members 32, is detachably fixed to the base member 1. In this embodiment, holes 11 and 322 are formed at corresponding positions in the horizontal portions 321 of the base member 1 and the connecting member 32, respectively. The shaft of a headed bolt 5 is passed through these holes 11 and 322 from one side of the base member 1 and the connecting member 32, and a nut 6 is tightened onto the protruding portion of the shaft that protrudes from the other side of the base member 1 and the connecting member 32. This fixes the anti-tipping member 3 to the base member 1. By loosening the nut 6 and removing the bolt 5, the anti-tipping member 3 can be removed from the base member 1.

[0033] When erecting the fence 20 over the groove 30, the anti-tipping member 3 is fixed to the base member 1, and then, as shown in Figure 3, the frame 10 is set up so that the base member 1 straddles the groove 30, and the anti-tipping member 3 is inserted into the groove 30. After that, as shown in Figures 1 and 2, the support posts 201 of the fence 20 are inserted inside the sheath pipe 2, and the fence 20 is erected over the groove 30.

[0034] The support frame 10 can prevent the fence 20 from tipping over in the groove width direction when the fence 20 is about to tip over in the groove width direction due to an external force F (see Figure 1) in the groove width direction, by having the legs 31 come into contact with the inner wall 301 of the groove 30 and the legs 31 catch on the inner wall 301.

[0035] In this embodiment, angle material is used for the legs 31 and connecting members 32, but the materials used for the legs 31 and connecting members 32 are not limited to these. For example, the legs 31 only need to have a contact portion that abuts against the inner wall 301 of the groove 30 when the fence 20 is about to tip over (surface contact is particularly preferable), and channel steel or square steel pipes with a U-shaped cross-section may be used. The connecting members 32 only need to have a horizontal portion 321 that is fixed to the base member 1, and both ends in the groove width direction should be fixed to the legs 31. For example, it is also possible to use channel steel with a U-shaped cross-section as the connecting member 32.

[0036] Furthermore, to prevent rust, a chemical agent may be applied to the base member 1, sheath pipe 2, and anti-tipping member 3 of the frame 10. For a similar purpose, stainless steel may be used for these components, or they may be hot-dip galvanized. However, this will increase the cost somewhat.

[0037] (3. Summary) As described above, in this embodiment, when erecting the fence 20 on the groove 30 using the frame 10, the legs 31 of the frame 10 are inserted into the groove 30. The frame 10 prevents the fence 20 from tipping over by the legs 31 contacting the inner wall 301 of the groove 30, improving the stability of the fence 20 even when it is installed on top of the groove 30. Furthermore, the anti-tipping member 3, including the legs 31, can be removed from the base member 1, and the frame 10 after the anti-tipping member 3 has been removed can be used when erecting the fence 20 in a place without a groove 30. In addition, the anti-tipping member 3 can be replaced to match the depth and width of the groove 30, and the length and position of the legs 31 can be optimized for the anti-tipping member 3.

[0038] Furthermore, the base member 1, sheath pipe 2, and anti-tipping member 3 of the frame 10 in this embodiment are readily available and relatively inexpensive commercially available parts, and no special processing is required. As a result, the frame 10 can be easily manufactured while keeping manufacturing costs down.

[0039] Furthermore, in this embodiment, when the fence 20 is about to tip over due to an external force F, such as when a person leans against it, a bicycle or car comes into contact with it, or an earthquake force acts upon it, the legs 31 come into contact with one of the inner walls 301 of the groove 30, and the legs 31 get caught on the inner wall 301, thereby preventing the fence 20 from tipping over.

[0040] Furthermore, in the frame 10 of this embodiment, multiple anti-tipping members 3 are provided at intervals in the extending direction of the groove 30, thereby improving the stability of the fence 20. Also, when installing the frame 10 in the groove 30 as shown in Figure 3, these anti-tipping members 3 prevent the frame 10 from rotating on the plane, and the position of the frame 10 can be fixed.

[0041] Furthermore, in the anti-tipping member 3, the legs 31 are connected to each other by the connecting member 32, so that the force applied to the legs 31 from the inner wall 301 of the groove 30 can be resisted by the connecting member 32. The connecting member 32 can also be used as a fixing part to fix the legs 31 to the base member 1.

[0042] (4. Variant) However, the present invention is not limited to the above-described embodiments. For example, in the above-described frame 10, a normal steel plate with a smooth upper surface is used as the base member 1, but as shown in Figure 5, a checker plate (diamond-patterned steel plate) having protrusions 12 for anti-slip purposes on its upper surface may be used as the base member 1a. This eliminates the concern that pedestrians may slip on the upper surface of the base member 1 in rainy weather, and more reliably ensures the safety of pedestrians while walking. In addition, although the plane of the base member 1 is rectangular, the corners of the plane may be chamfered into an arc shape, as shown in Figure 5, to prevent tripping or stumbling while walking. Furthermore, the shape of the base member 1 can be freely set, such as circular or elliptical, taking into consideration the shape and size of the groove 30.

[0043] Furthermore, although the sheath pipe 2 is fixed to approximately the center of the upper surface of the base member 1, depending on the positional relationship between the fence 20 and the groove 30 in the plane, the fixing position of the sheath pipe 2 on the upper surface of the base member 1 can be eccentrically offset from the center of the upper surface in the groove width direction (corresponding to the left-right direction in Figure 5), as shown in Figure 5. However, the amount of eccentricity should not impair the stability of the fence 20.

[0044] Alternatively, the number of holes 11 in the base member 1 may be increased so that the fixing position of the anti-tipping member 3 in the groove width direction and the extension direction of the groove 30 can be selected (by selecting and fixing a suitable hole 11).

[0045] Furthermore, the diameter of the cross-section of the support post 201 (hereinafter referred to as the cross-sectional diameter) may differ depending on the type and manufacturer of the fence 20. In response to this, multiple frames 10 may be manufactured with different cross-sectional diameters of the sheath pipe 2 to match the differences in the cross-sectional diameters of the support posts 201. Alternatively, the cross-sectional diameter of the sheath pipe 2 may be made large enough to accommodate support posts 201 with various cross-sectional diameters, and a filler material may be inserted into the gap between the sheath pipe 2 and the support post 201. This allows one frame 10 to be used for multiple fences 20 with different cross-sectional diameters of the support posts 201, and by inserting a filler material into the gap between the sheath pipe 2 and the support post 201, the wobbling of the support post 201 can be easily prevented, thereby increasing the stability of the fence 20.

[0046] Figure 6 shows an example of the filler material 7 described above, with the sheath pipe 2 viewed from above. In the example in Figure 6, the sheath pipe 2 and the support column 201 are cylindrical, and the filler material 7 has an arc-shaped cross-section. A pair of filler materials 7 are placed on both sides of the support column 201.

[0047] The cross-sectional shapes of the sheath pipe 2 and the support column 201 are not particularly limited. The shape and number of the filler material 7 can also be changed according to the cross-sectional shape and diameter of the sheath pipe 2 and the support column 201, and are not limited to the above. As one embodiment of the filler material 7, a wedge of an appropriate shape and size may be inserted from above.

[0048] Alternatively, a screw hole (not shown) may be provided through the side of the sheath tube 2, and a bolt may be screwed into the screw hole. The tip of the bolt may then press the support column 201 against the inner surface of the sheath tube 2 to prevent the support column 201 from wobbling. However, in this case, the head of the bolt will protrude to the outside of the sheath tube 2, raising concerns that pedestrians may get caught on it while walking.

[0049] In the above embodiment, the support post 201 of the fence 20 is held in place by inserting it inside the sheath pipe 2, but the method of holding the support post 201 is not limited to this. For example, a protruding part (holding member) such as a steel pipe fixed to the upper surface of the base member 1 may be inserted inside the cylindrical support post 201. The support post 201 can also be held in place by this method.

[0050] Furthermore, the shape of the anti-tipping member 3 is not limited to the above embodiment; any shape that can abut against the inner wall 301 of the groove 30 and prevent the fence 20 from tipping over is acceptable. For example, the connecting member 32 may be omitted, and end plates (not shown), which are horizontal members, may be provided at the upper ends of each leg portion 31, and these end plates may be detachably fixed to the base member 1 using bolts 5 and nuts 6.

[0051] In the above embodiment, multiple anti-tipping members 3 are arranged at intervals in the extending direction of the groove 30, but the number of anti-tipping members 3 is not particularly limited, and only one anti-tipping member 3 may be provided.

[0052] Furthermore, as shown in Figure 7 by a perspective view similar to that in Figure 3, the anti-tipping member 3a may be a single large leg having a rectangular cross-section. A square steel pipe or the like can be used for this leg. A horizontal end plate (not shown) is provided at the upper end of the leg, and this end plate can be detachably fixed to the base member 1 using bolts 5 and nuts 6.

[0053] This anti-tipping member 3a also protrudes columnarly from the lower surface of the base member 1, and the sides of the anti-tipping member 3a facing each other in the groove width direction are positioned on one inner wall 301 side and the other inner wall 301 side of the groove 30. By contacting these inner walls 301, the anti-tipping member 3a can prevent the fence 20 from tipping over in the groove width direction.

[0054] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea disclosed herein, and these will naturally also fall within the technical scope of the present invention. [Explanation of symbols]

[0055] 1, 1a: Base member 2: Sheath tube (holding member) 3, 3a: Anti-tipping component 10: Stand 20: Fence 30: Groove 31: Legs 32: Connecting material 100: Fence installation structure 201: Strut 301:Inner wall

Claims

1. A metal frame for erecting a fence with posts on top of a ditch, A plate-shaped base member, A holding member for holding the support column is fixed to one of the plate surfaces of the base member, A leg portion that protrudes columnarly from the other plate surface of the base member and abuts against the inner wall of the groove to prevent the fence from tipping over, It has, A frame characterized in that the legs are detachably fixed to the base member.

2. The frame according to claim 1, characterized in that the legs are provided on one inner wall side and the other inner wall side of the opposing inner walls of the groove.

3. The frame according to claim 2, characterized in that the leg portion on one inner wall side and the leg portion on the other inner wall side are considered as a pair of legs, and a plurality of pairs of legs are provided at intervals in the direction of extension of the groove.

4. The end of the leg on the base member side on one inner wall side and the end of the leg on the base member side on the other inner wall side are connected by a connecting member. The frame according to claim 2, characterized in that the connecting member is detachably fixed to the base member.

5. The frame according to claim 1, characterized in that the base member is a checker plate.

6. A fence installation structure comprising erecting a fence on a ditch using the frame described in claim 1, The legs of the frame are inserted into the grooves. The base member is positioned so as to straddle the groove, A fence installation structure characterized in that the support posts of the fence are held by the holding member.

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