JP7822902B2 - Netting fixture and fence using same - Google Patents

Description

The invention disclosed in this application relates to a fence that is installed to surround a road or a site to prevent animals from running off the road or entering the site, and more specifically to a mounting fixture for fixing a mesh material to the frame material of the fence, and a fence using the mounting fixture.

Fences (protective fences) are installed on the sides of highways and other roads to prevent vehicles and cargo from escaping the road. Fences are also sometimes installed to surround specific areas, such as facility grounds or parks, to prevent entry to those areas. Most of these types of fences are made up of pillars erected at appropriate intervals, frame members on the top, bottom, left, and right sides supported by the pillars, and mesh material attached within the frame enclosed by the frame members.

Patent Document 1 discloses a wire mesh locking structure for a fence (corresponding to a fence body) constructed by attaching wire mesh (corresponding to a mesh material in the case of furring strips (corresponding to a frame material in the case of the invention disclosed in this application) to a furring strip (corresponding to a fence body in the case of furring strips). The locking structure engages horizontal rib wires (corresponding to tension wires in the case of furring strips) inserted into the vertical edge of the wire mesh to maintain its shape, with locking tabs cut into the vertical plates of the furring strips.

However, with the wire mesh locking structure disclosed in Patent Document 1, when an excessive load is applied to the wire mesh, the horizontal ribs may come off the locking tabs, causing the wire mesh to fall off the furring strip. However, if attempts are made to secure the edge of the wire mesh to the furring strip using fastening hardware such as bolts and nuts instead of locking tabs, workers would need to fasten the fastening hardware to the furring strip while holding the edge of the wire mesh along the furring strip, which makes work difficult.

Patent Document 2 proposes a protective fence (corresponding to a fence) configuration that reduces the risk of the net material falling off the frame (corresponding to the frame material in the invention disclosed in this application) and also improves workability when attaching the net material. This configuration involves forming engagement claws on an engagement member attached to the frame that holds the net material to engage with the edge of the net material, and disengagement prevention members that prevent the edge of the net material from disengaging from the engagement claws are positioned on the opposite side of the engagement member across the net material, and the disengagement prevention members are bolted to the engagement member with the net material sandwiched between them.

Jitszen No. 63-184864 JP 2016-125300 A

In the invention disclosed in Patent Document 2, the edges of the wire mesh must be locked onto the engaging claws of all engaging members attached to the frame located on the upper side of the protective fence, and then a release prevention member must be placed on each engaging member. In this state, a bolt must be inserted through the engaging members and release prevention member and fastened with a nut. At this time, one hand must be holding the release prevention member and nut, while the other hand must be holding and turning the bolt, making it difficult to hold down the wire mesh at the same time. Therefore, the invention disclosed in Patent Document 2, like the invention disclosed in Patent Document 1, runs the risk of the wire mesh falling off the engaging claws of the engaging members before the engaging members and release prevention member are fastened with the bolts. The same is true for the frames located on both sides and below the protective fence; it is not easy to attach release prevention members while temporarily fastening the edges of the wire mesh to the engaging members.

Furthermore, with the invention disclosed in Patent Document 2, the work of threading nuts onto bolts inserted through the engaging members and anti-detachment members must be done from the rear side of the wire mesh, making the work position difficult. Since work on expressway overpasses is often only possible from the road side, there is a risk of an accident, such as dropping the nuts to the outside of the road (under the overpass).

The invention disclosed in this application was conceived to improve the ease of work involved in installing the aforementioned mesh material, and aims to provide an easy-to-use mesh material installation tool that makes installation of mesh material easier and safer than ever before, as well as a fence body using this installation tool.

The mesh material mounting fixture of the invention disclosed in this application is a fixture for mounting the edge of the mesh material to the frame material in a fence structure comprising multiple frame materials supported by suitable pillars and mesh material stretched within a frame surrounded by the frame materials. The fixture comprises a flat mounting base plate attached to the inside of the frame material and positioned parallel to the mesh material, a mesh material locking member formed separately from the mounting base plate and assembled to the mounting base plate, and a fastening member that overlaps and joins the mounting base plate and the mesh material locking member. The mounting base plate has an assembly hole with a long axis parallel to the frame material and positioned near the frame material, and a fastening member insertion hole positioned away from the assembly hole toward the inside of the frame. The net locking member has an insert that can be inserted into the assembly hole of the mounting base, a net receiving section that is bent forward from one edge of the insert, and a locking claw that extends from the front edge of the net receiving section, bending in the opposite direction to the insert. A fastening member attachment hole is formed in the insert, and the insert of the net locking member is inserted into the assembly hole of the mounting base from the front side and overlaps the back side of the mounting base. With the tip of the locking claw facing the frame and held on the front side of the mounting base, the mounting base and the insert are joined via a fastening member inserted into the fastening member insertion hole and the fastening member attachment hole.

With this type of net mounting fixture, the net locking member with the locking tab is formed separately from the mounting base, and by inserting its insertion tab into an assembly hole formed in the mounting base, the net tension wire can be easily locked onto the locking tab. Since the net locking member and fastening members are assembled to the mounting base and the net can be locked even when the fastening members are temporarily fastened, it is possible to perform the procedure of first locking the net tension wire to multiple mounting fixtures and then fully tightening the fastening members all at once.

Furthermore, the net mounting fixture according to the invention disclosed herein employs an additional configuration in which the net material receiving portion of the net material locking member is wider than the longitudinal dimension of the assembly hole, the fastening member insertion hole formed in the mounting base is an elongated hole extending perpendicular to the longitudinal axis of the assembly hole, and the insertion piece of the net material locking member is inserted into the mounting base's mounting hole from the front side, with the net material receiving portion abutting against the mounting hole, and the net material locking member is held so that it can swing back and forth relative to the mounting base, with the abutment point with the assembly hole as a fulcrum. With this configuration, even when the fastening member is inserted into the mounting base and the net material locking member and loosely fastened, the net material locking member can swing within a certain range, making the net material locking process even easier.

In the above-described configuration, the fastening members can be bolts and nuts, the fastening member mounting holes formed in the insert pieces of the mesh material locking members can be bolt insertion holes, and the mounting base and the insert pieces can be fastened together by the bolts and nuts. With this configuration, the direction in which the bolts are inserted can be selected depending on the conditions at the construction site.

Alternatively, the fastening member can be a bolt, the fastening member mounting hole formed in the insertion piece of the mesh material locking member can be a female threaded hole, and the bolt can be fastened to the female threaded hole from the front side of the mounting base. With this configuration, the mesh material can be locked and the fastening member can be fully tightened simply by working from the front side of the mesh material, further improving workability and eliminating the risk of dropping nuts or other items behind the mesh material.

The fence body according to the invention disclosed in this application is characterized in that the mounting base of the net material mounting fixture configured as described above is attached to the inside of the frame of the frame material that holds the edge of the net material, the net material locking member and the fastening member are assembled to the mounting base, and the shape-retaining tension wires arranged on the edge of the net material are locked by the locking claws of the net material locking member from the front side of the mounting base and held in the net material receiving portion, with the mounting base and the net material locking member being connected via the fastening member.

In the net mounting fixtures configured as described above, the net locking members with locking tabs are formed separately from the mounting base. Therefore, the insertion tabs of the net locking members can be inserted into the mounting holes of the mounting base, and the fastening members can be loosely fastened. The net tension wires can then be easily locked to the locking tabs of the net locking members. This increases the flexibility of manual work, allowing the net tension wires to be quickly locked to multiple mounting fixtures, while also reducing the risk of the net falling off the mounting fixtures during the process. Furthermore, because the net locking members and fastening members can be pre-assembled to the mounting base, there is no risk of accidentally dropping the net locking members or fastening members during on-site work. After the net tension wires are locked to multiple mounting fixtures, the fastening members of each mounting fixture can be fully tightened together to firmly hold the net to the frame. This significantly improves the ease of attaching nets to mounting fixtures attached to a frame.

Furthermore, if the net material locking member is configured to be able to swing back and forth while attached to the mounting base, the work of temporarily fastening the net material becomes even easier. In addition, the length of the locking claw can be extended by the amount that the net material locking member can swing, thereby increasing the holding force of the net material.

1A and 1B are a front view and a cross-sectional view along line AA showing a schematic configuration example of a fence body to which the invention disclosed in the present application is applied. 1 is a perspective view of a mounting base plate and a mesh material locking member in a mounting fixture according to one embodiment of the present invention. FIG. 3A and 3B are a front view and a top view of the mounting substrate of FIG. 2 . 5A is a front view, FIG. 5B is a top view, and FIG. 5C is a side view of the net material locking member of FIG. 4. FIG. 10 is a perspective view showing an assembly form of the mounting base plate, the mesh material mounting member, and the fastening member. 10 is a side view of the mounting base plate, the mesh material mounting member, and the fastening member assembled and temporarily fastened. FIG. FIG. 10 is a side view of the mounting base plate, the mesh material mounting member, and the fastening member in a fully fastened state after assembly. 8A and 8B are a front view and a top view, respectively, of the fully tightened state of FIG. 7 . FIG. 10 is a side view showing a partially modified configuration of the fastening member in the mounting fixture in a pre-fastened state.

Embodiments of the invention disclosed in this application will be described below with reference to the drawings. Figure 1 shows a schematic configuration example of a fence 1 to which a mounting device according to this invention can be applied. This type of fence 1 basically comprises a number of pillars 2 erected at appropriate intervals along the boundary of the area to be partitioned, a number of frame members 3 supported by these pillars 2, and a mesh member 4 stretched within the frame enclosed by these frame members 3. However, this invention does not particularly limit the type or shape of the area to be partitioned. Furthermore, there are no particular limits on the type, structure, material, etc. of the pillars 2 and the foundation structures supporting these pillars 2.

The frame members 3 extend horizontally and vertically (and diagonally in some cases) depending on the length and height of the area to be partitioned. Figure 1 shows upper and lower frame members 31 and 32 extending horizontally and facing each other, and a vertical frame member 33 connecting them at one side end, but the arrangement and connection of the frame members 3 are not particularly limited in this invention. Furthermore, while the illustrated embodiment uses circular pipes for the frame members 3, square timbers or shaped members of an appropriate cross section can also be used instead.

The mesh material 4 is cut to a size that fits within the dimensions of the frame enclosed by the frame material 3 and stretched within the frame. Tendons 41, made of thick steel wire or the like, are attached to the edges of the mesh material 4 to maintain its shape. In the illustrated embodiment, diamond-shaped wire mesh is used as the mesh material 4, but other materials that can be used include crimped wire mesh, made by corrugating metal wire and weaving it into a lattice pattern; tortoiseshell wire mesh, made by weaving metal wire into a hexagonal pattern; lattice panels, made by joining metal wires together without weaving them; expanded metal, made by cutting staggered slits into a thin metal plate and expanding it; and punched metal, made by punching numerous equally spaced holes into a thin metal plate. Furthermore, the mesh material 4 is not limited to being made of metal; it may also be made of synthetic resin, wood, bamboo, or other natural materials.

The mounting fixture 5 according to this invention is a component that is connected to the frame material 3 at the circled portion B of the fence body 1 as shown in the example, and is configured to lock onto the tension wires 41 arranged at the edge of the mesh material 4. Figures 2 to 8 show the configuration of the mounting fixture 5 according to one embodiment of this invention.

The mounting fixture 5 of this invention basically comprises a flat mounting base 6 attached to the inside of the frame material 3 and positioned parallel to the mesh material 4; a mesh material locking member 7 formed separately from the mounting base 6 and attached to the mounting base 6; and a fastening member 8 that overlaps and connects the mounting base 6 and the mesh material locking member 7. The detailed configuration of each of these components is described below. When describing the relative positions and operational directions of parts and components below, the front side, as viewed perpendicular to the surface of the fence body 1 (front view in Figure 1), is defined as the side in front of where the mesh material 4 is to be attached, and the opposite side across the mesh material 4 is defined as the back side, and the up-down direction (height direction), left-right direction (width direction), and front-to-back direction (depth direction) are specified based on these.

The mounting substrate 6 is a flat plate piece that is generally rectangular or U-shaped when viewed from the front, with at least one straight side. The mounting substrate 6 is attached to the inside of the frame member 3 (upper frame member 31 in the embodiment of Figure 2) with one straight side parallel to the axis of the frame member 3, and is positioned parallel to the tensioning surface of the mesh member 4. The mounting substrate 6 can be attached to the frame member 3 by welding, or by using appropriate mounting hardware, screws, etc. When attaching the mesh member 4, multiple mounting substrates 6 are attached in advance at approximately equal intervals to the frame member 3 to which the mesh member 4 will be attached.

Two through holes are formed in the mounting substrate 6. The first through hole is an assembly hole 61 located closer to the frame material 3 and is formed in the shape of an elongated rectangle or oval with its long axis parallel to the frame material 3. The second through hole is a fastening member insertion hole 62 located away from the assembly hole 61 toward the inside of the frame and is formed in the shape of an oval extending perpendicular to the long axis of the assembly hole 61. Although not shown, the fastening member insertion hole 62 may open on the opposite side of the frame material 3 on the mounting substrate 6 (the lower side in the illustrated embodiment). The assembly hole 61 and fastening member insertion hole 62 are both located in the center of the width of the mounting substrate 6 so as to be symmetrical when viewed from the front.

The net material locking member 7 is a member formed by bending a single plate into a roughly Z-shape (crank shape) in side view. The net material locking member 7 has an insertion piece 71 that is roughly rectangular or U-shaped in front view, a net material receiving portion 73 that bends forward from one edge of the insertion piece 71 and continues, and a locking claw piece 74 that is inverted U-shaped in front view and bends from the front edge of the net material receiving portion 73 and extends in the opposite direction from the insertion piece 71. The insertion piece 71 is formed with a width that allows it to be inserted into the assembly hole 61 of the mounting base 6. A fastener mounting hole 72 is formed near the tip of the insertion piece 71 for inserting a bolt 81 of the fastening member 8, which will be described later. The fastener mounting hole 72 in the illustrated embodiment is a circular through-hole.

The mesh material receiving portion 73 is bent forward at approximately 90 degrees relative to the insertion piece 71 and continues from it. The mesh material receiving portion 73 is formed so that its opposite edges jut out to the left and right, and its width is greater than the long axis dimension of the assembly hole 61.

The locking claw 74 is bent and connected to the net material receiving portion 73 at an angle slightly greater than 90 degrees (approximately 96 degrees in the illustrated embodiment). In the illustrated embodiment, the locking claw 74 is formed so that its width is smaller than the width of the net material receiving portion 73, but it is also acceptable for the locking claw 74 to be formed approximately the same width as the net material receiving portion 73 or wider.

The fastening member 8 is composed of, for example, a bolt 81 and a nut 82. In the illustrated embodiment, a flanged hexagonal bolt and hexagonal nut are used.

As shown in Figures 5 and 6, the mounting base 6 and net material locking member 7 are assembled by inserting the insertion piece 71 of the net material locking member 7 into the assembly hole 61 of the mounting base 6 from the front side. The net material receiving portion 73 of the net material locking member 7 is designed so that it cannot pass through the assembly hole 61, so the net material receiving portion 73 and the locking claw piece 74 are held on the front side of the mounting base 6 and can swing back and forth around the point of contact with the assembly hole 61. The depth of the net material receiving portion 73 is designed so that when the net material locking member 7 is assembled to the mounting base 6, the portion that protrudes forward of the mounting base 6 is larger than the diameter of the tension wire 41 of the net material 4.

When the locking tab 74 is raised toward the frame material 3, the insertion piece 71 of the mesh locking member 7 overlaps the rear side of the mounting base 6, and the fastening member insertion hole 62 formed in the mounting base 6 matches the fastening member mounting hole 72 formed in the insertion piece 71. When a bolt 81 is inserted into the fastening member insertion hole 62 and the fastening member mounting hole 72 and fastened with a nut 82, the state shown in Figures 7 and 8 is achieved. In the illustrated embodiment, the bolt 81 is inserted from the rear side and the nut 82 is fastened from the front side, but the bolt 81 can be inserted either front or rear depending on the installation location and other conditions.

When attaching the net material 4 to this mounting fixture 5, the tension wires 41 of the net material 4 can be easily attached to the tension wires 74 from the front side by tilting the locking tabs 74 forward without fastening the fastening members 8, as shown in Figure 6. Furthermore, the fastening member insertion holes 62 formed in the mounting base 6 of this mounting fixture 5 are elongated holes extending perpendicular to the long axis of the assembly hole 61. Therefore, even when the fastening members 8 are inserted into the mounting base 6 and the net material locking members 7 and loosely fastened, the net material locking members 7 can still swing within a certain range. Therefore, by first assembling the net material locking members 7 and fastening members 8 to multiple mounting bases 6 attached to the frame 3 and temporarily fastening the fastening members 8, the installation work can be performed by engaging the tension wires 41 of the net material 4 to multiple mounting fixtures 5 and then fully tightening the fastening members 8 collectively.

This procedure significantly improves workability compared to the conventional procedure of fastening a fastening member 8 to each mounting fixture 5 to which the tension wires 41 of the net material 4 are attached. Furthermore, the length of the locking tabs 74 can be slightly extended to allow for swinging of the net material locking member 7, making it easier to prevent the temporarily fastened net material 4 from falling off. Furthermore, when fastening the upper edge of the net material 4 to the mounting fixture 5 attached to the upper frame member 31, the weight of the fastening member 8 inserted into the insertion piece 71 and temporarily fastened causes the net material locking member 7 to rotate backward, naturally pointing the locking tabs 74 upward, making the tension wires 41 temporarily fastened to the net material locking member 7 even less likely to fall off. Furthermore, once the fastening member 8 is fully fastened, the tension wires 41 of the net material 4 are firmly held on the net material receiving portion 73, as shown in Figure 7.

Figure 9 shows a modified version of the fastening member 8 in the mounting fixture 5 described above. The fastening member 8 in this example is comprised solely of a bolt 81, without a nut. The bolt 81 in this example is a hexagonal socket bolt 81 with a knurled head, but the shape of the head is not particularly limited. Meanwhile, the fastening member mounting hole 72 formed in the insert piece 71 of the mesh material retaining member 7 is internally threaded, and the bolt 81 is fastened to this internally threaded hole from the front side of the mounting base 6. In this example, the fastening member mounting hole 72 is formed by thickening the periphery, but thickening may not be necessary if the insert piece 71 is sufficiently thick. Furthermore, if the insert piece 71 is thin, a thin nut thin enough to pass through the mounting hole 61 in the mounting base 6 may be welded to form the internally threaded hole. Adopting this configuration eliminates the need to set the fastening member 8 on the back side of the mesh material 4, and instead requires only the front side of the mesh material 4, further improving workability. It also prevents accidents such as dropping nuts 82 onto the back side of the mesh material 4.

Note that if a female threaded hole like the one shown in the example is used, the direction in which the bolt 81 can be inserted is limited, which may reduce workability depending on the conditions at the construction site. In contrast, the bolt 81 and nut 82 described above have the advantage that the direction in which the bolt 81 can be inserted is not limited, allowing work to be done according to the construction site.

By using the fixtures 5 configured as described above, the worker no longer has to manually hold down the mesh material 4 temporarily attached to each fixture 5 to prevent it from falling off, or fasten the fastening members 8 to each temporarily attached fixture 5. This increases the worker's freedom of use and allows for the efficient completion of the entire process, from temporarily fastening the mesh material 4 to fully tightening the fastening members 8. This significantly improves the workability of attaching the mesh material 4 to the frame material 3.

The technical scope of the invention disclosed in this application should not be interpreted as being limited by the illustrated embodiments, but should be interpreted conceptually based on the claims. The names of elements used in the claims and specification are for convenience in making the invention easier to understand specifically, and do not unnecessarily limit the concept or properties of those elements. When implementing the invention disclosed in this application, the detailed shape, dimensions, materials, quantity, combination with other elements, relative positional relationships, etc. of elements not specifically identified in the claims may be modified as appropriate within the scope that achieves substantially the same operational effects as the illustrated embodiments.

The invention disclosed in this application can be widely used as a technology for attaching mesh material to frame materials for protective fences and various other fence structures installed along the boundaries of specific areas such as roads, lots, and parks to enclose or divide those areas.

DESCRIPTION OF SYMBOLS 1 Fence body 2 Pillar body 3 Frame material 31 Upper frame material 32 Lower frame material 33 Vertical frame material 4 Mesh material 41 Gusset wire 5 Mounting fixture 6 Mounting base 61 Assembly hole 62 Fastening member insertion hole 7 Mesh material locking member 71 Insertion piece 72 Fastening member mounting hole 73 Mesh material receiving portion 74 Locking claw piece 8 Fastening member 81 Bolt 82 Nut

Claims (5)

In a fence structure including a plurality of frame members supported by suitable pillars and a mesh member stretched within a frame surrounded by the frame members, a fixture for attaching the edge of the mesh member to the frame members,
a flat mounting base plate attached to the inner side of the frame member and arranged parallel to the mesh member;
a mesh material locking member formed separately from the mounting base and assembled to the mounting base;
a fastening member that overlaps and connects the mounting base plate and the mesh material locking member;
Equipped with
The mounting base plate is formed with an assembly hole having a long axis parallel to the frame material and arranged close to the frame material, and a fastening member insertion hole arranged spaced apart from the assembly hole toward the inside of the frame,
The net material locking member has an insert piece that can be inserted into the assembly hole of the mounting base, a net material receiving portion that is bent forward from one end edge of the insert piece and continues, and a locking claw piece that is bent from the front end edge of the net material receiving portion and extends in the opposite direction to the insert piece, and a fastening member mounting hole is formed in the insert piece,
A mesh material mounting fixture configured so that the insertion piece of the mesh material locking member is inserted into the assembly hole of the mounting base from the front side and overlapped on the back side of the mounting base, and the locking claw piece is held on the front side of the mounting base with its tip facing the frame material side, and the mounting base and the insertion piece are connected via fastening members inserted into the fastening member insertion hole and the fastening member mounting hole. 2. The netting attachment according to claim 1,
The mesh material receiving portion of the mesh material locking member is formed wider than the major axis dimension of the assembly hole, and
a fastening member insertion hole formed in the mounting base plate is formed as an elongated hole extending in a direction perpendicular to the long axis of the assembly hole;
A mesh material mounting device characterized in that the insertion piece of the mesh material locking member is inserted into the assembly hole of the mounting base from the front side, and with the mesh material receiving portion abutting against the assembly hole, the mesh material locking member is held so that it can swing back and forth relative to the mounting base with the abutment point with the assembly hole as a fulcrum. The net material mounting device according to claim 1 or 2,
the fastening members are bolts and nuts,
The fastening member mounting hole formed in the insertion piece of the net material locking member is a bolt insertion hole,
The mounting base and the insert are connected by the bolts and nuts. The net material mounting device according to claim 1 or 2,
the fastening member is a bolt,
The fastening member mounting hole formed in the insertion piece of the net material locking member is a female threaded hole,
The mounting fixture for a mesh material is characterized in that the bolt is fastened into the female screw hole from the front side of the mounting base plate. The mounting base of the net material mounting fixture according to claim 1 or 2 is attached to the inside of the frame of the frame material that holds the edge of the net material, and the net material locking member and the fastening member are assembled to the mounting base,
In a state where the shape-retaining tension wires arranged at the edge end of the net material are engaged with the engaging claw pieces of the net material engaging member from the front side of the mounting base plate and held in the net material receiving portion,
A fence body characterized in that the mounting base plate and the mesh material locking member are connected via the fastening member.