JP2016125300A - Guard fence and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guard fence with reduced risk of falling off of a net material from a frame body and improved workability.SOLUTION: A guard fence 1 has a holding frame 3 that holds a wire net 2. The holding frame 3 comprises: multiple engaging members 14, which link to at least an upper part of a frame body 10, engage to a bracing wire 7 of the wire net 2, and have engaging claws 22 that engage to a body part 21 and the bracing wire 7 of the wire net 2; a falling-off preventive plate 15, which prevents the bracing wire 7 of the wire net 2 from falling off the engaging member 14 by covering a part of the engaging claw 22 where the engaging claw abuts the bracing wire 7 of the wire net 2; and a bolt 16, which couples the falling-off preventive plate 15 to the body part 21.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a protective fence for preventing an object from jumping out of a specific area such as a road.

  Conventionally, a protective fence is installed on a side edge of a road such as an expressway in order to prevent a vehicle or a load of the vehicle from falling outside the road. Such a protective fence is comprised from a wire mesh and the frame body which hold | maintains a wire mesh like the fence described in patent document 1, for example. The frame body is provided with an engaging claw piece with which a transverse bone line constituting the edge portion of the wire mesh is engaged. The wire mesh is held by the frame body by the horizontal bone line of the wire mesh engaging with the engaging claw pieces.

Japanese Utility Model Publication No. 63-184864

  However, in the fallen object protection fence as described above, since the wire mesh is held by engaging the wire mesh's horizontal bone line with the engaging claw piece, the horizontal wire line is engaged when a large load is applied to the wire mesh. When it moves to the tip side of the nail piece, the wire mesh may come off from the frame. On the other hand, in order to prevent the wire mesh from falling off the frame body, in the case where the edge portion of the wire mesh is held on the frame body by using a fixing metal fitting instead of the engaging claw piece, the operator removes the edge portion of the wire mesh. There is a problem that it is difficult to improve the workability because it is necessary to attach the fixing bracket to the frame body by bolting or the like while pressing and positioning it along the frame body.

  In order to solve this problem, it is an object of the present invention to provide a protective fence that reduces the risk of the net member being detached from the frame and has improved workability.

  The protective fence according to the present invention is a protective fence for preventing an object from jumping out from a specific area to the outside, and is provided upright in the vicinity of the boundary between the area and a net member that partitions the inside and outside of the area. A holding frame that holds the frame member, and the holding frame is connected to at least an upper part of the frame member and engages with an edge portion of the mesh member. An engaging member having an engaging claw that protrudes from the surface of the main body portion and engages with an edge portion of the net member, and opposite to the main body portion with the net member interposed therebetween. A disengagement preventing member disposed on the side and for preventing the edge portion of the mesh material from separating from the engagement member by covering a portion of the engagement claw that contacts the edge portion of the mesh material; and the main body In the state where the mesh material is interposed between the part and the separation preventing member, the separation Has a bolt for fastening the preventing member to the body portion, it is characterized in.

  According to this configuration, when attaching the mesh member to the holding frame, first, the mesh member is engaged with the engaging claws of the engaging member attached to the upper part of the frame member of the holding frame, thereby the mesh member. Is temporarily placed on the top of the frame. In this state, the operator does not need to hold the net material on the upper part of the frame by hand, and both hands can be used freely, so that the subsequent work can be easily performed, and workability is improved. Specifically, after the net material is temporarily placed, the operator uses both hands to engage the edge portion of the net material with the engaging claw at a portion other than the upper portion of the frame body. Then, after the operation of engaging the edge portion of the mesh material with the engagement claw is completed, the operator makes the separation preventing member face the main body portion of the engagement member, and the net material is connected to the main body portion of the engagement member. The detachment prevention member is sandwiched and held between the detachment prevention member, and the detachment prevention member is fastened to the main body by a bolt with a net member interposed between the detachment prevention member and the main body. Since the operator does not need to position the net member by pressing it with his / her hand, he / she can work with both hands. As described above, since the net member can be easily attached to the holding frame, the workability is improved as compared with the conventional protective fence.

  Further, in a state where the mesh material is attached to the holding frame, the separation preventing member covers a portion of the engagement claw that contacts the edge portion of the mesh material, so that the edge portion of the mesh material is directed toward the tip of the engagement claw. It is possible to prevent the edge portion of the mesh member from being detached from the engaging member. Therefore, the edge portion of the mesh member is engaged with the engagement claw and is prevented from being detached from the engagement member by the separation preventing member fastened to the engagement member with the bolt. Therefore, it is possible to reduce the possibility that the net member is detached from the holding frame by both the engaging claw and the separation preventing member.

  A through hole into which the bolt is inserted is formed in the main body, and the through hole opens with respect to the engagement claw when the engagement claw receives a load from an edge portion of the mesh material. And the bolt is constrained from the opposite side of the edge portion of the mesh material to restrain the opening of the engaging claw and is inserted into the through hole in the body portion. It is preferable to be fixed to.

  According to this configuration, the bolt can not only fasten the separation preventing member to the main body portion of the engaging member but also can suppress the opening of the engaging claw. Specifically, the bolt is inserted into a through-hole located in the opening direction of the engaging claw at a position where the engaging claw is restrained from the opposite side of the edge portion of the mesh material and the opening of the engaging claw is suppressed. Since it is fixed to the main body in a state where the mesh material is loaded, the engagement claw can be restrained from the opposite side of the edge of the mesh material even when a load is applied to the mesh material, and the engagement claw can be prevented from opening. As a result, it is possible to reduce the possibility that the net member is detached from the holding frame.

  The separation preventing member preferably has an insertion hole having a size into which the engagement claw and the bolt can be inserted.

  According to this configuration, when the separation preventing member is fastened to the main body portion of the engagement member with the bolt, the engagement claw and the bolt are inserted into the insertion hole of the separation prevention member, and in this state, the separation prevention member is engaged. The net member is fastened to the main body portion with a bolt in a state where a net member is interposed between the main body portion of the combined member. Therefore, the separation preventing member does not interfere with the engaging claws, and the interval between the separation preventing member and the main body can be narrowed, and the net member can be strongly sandwiched between the separation preventing member and the main body. Become. Thereby, it becomes possible to hold | maintain a net | network material more firmly with respect to a holding | maintenance frame, and it is possible to reduce the shakiness and shakiness of a net | network material.

  The frame body includes a plurality of bars that surround the net member, and the holding frame further includes a connection member that connects the engagement member and the separation preventing member, and the connection member includes the engagement member. A first end connected to the joint member, a second end connected to the disengagement prevention member, and an outer peripheral surface of the cross on the side opposite to the engaging claw of the cross, thereby It is preferable that the joint claw has a contact portion having a shape capable of transmitting the load when the load is received from the edge portion of the mesh material to the crosspiece.

  According to such a configuration, the contact portion of the connecting member abuts the outer peripheral surface of the crosspiece on the side opposite to the engagement claw in the crosspiece, so that the engagement claw receives a load from the edge portion of the net member. It is possible to transmit the load to the crosspiece. Therefore, the load applied to the engaging claw can be received by the entire crosspiece via the connecting member.

  The contact portion has an inner peripheral surface having a shape corresponding to the outer peripheral surface of the crosspiece, and the contact portion surrounds the outer periphery of the crosspiece, and the inner peripheral surface is fitted to the outer peripheral surface of the crosspiece. It is preferable to combine them.

  According to such a configuration, the first and second of the connecting member can be obtained simply by fitting the inner peripheral surface of the contact portion to the outer peripheral surface of the crosspiece while surrounding the contact portion of the connecting member around the outer periphery of the crosspiece of the frame body. It is possible to easily attach the engaging member and the detachment preventing member connected to the end of the frame to the frame. Therefore, since an operation such as welding is not required for attaching the engaging member to the frame body, the engaging member can be easily attached to the already installed frame body.

  It is preferable that the connecting member, the engaging member, and the separation preventing member are integrally formed.

  According to such a configuration, it is possible to easily and inexpensively form the connecting member, the engaging member, and the separation preventing member using the metal thin plate or the like.

  The present invention also provides a method for manufacturing the above-described protective fence. In this manufacturing method, the engagement claw is cut and raised from a flat plate-like material at a place where the through hole is formed, whereby the body portion and the engagement claw having the through hole positioned in the opening direction of the engagement claw. Forming the engagement member, attaching the engagement member to the frame, engaging an edge portion of the mesh material with the engagement claw, and inserting the bolt into the through hole. And a step of fastening the separation preventing member to the main body portion with the bolt.

  According to this configuration, the engagement claw and the main body portion having the through hole located in the opening direction of the engagement claw are provided by cutting and raising the engagement claw from the flat plate material at the place where the through hole is formed. The engaging member can be easily and inexpensively formed using a metal thin plate or the like. As a result, the protective fence can be manufactured at low cost.

  As described above, according to the protective fence of the present invention, it is possible to reduce the possibility that the net member is detached from the frame body and to improve the workability.

  Further, according to the method for manufacturing a guard fence of the present invention, the engaging member can be easily and inexpensively formed using a metal thin plate or the like, so that the guard fence can be manufactured at a low cost.

It is a front view which shows embodiment of the protection fence of this invention. FIG. 2 is an enlarged front view showing a portion in the vicinity of an engagement member and a separation preventing plate in FIG. 1. It is a side view of the protection fence of FIG. FIG. 4 is an enlarged cross-sectional view showing a portion near an engagement member and a separation preventing plate in the upper beam of FIG. 3. It is an enlarged front view of the engaging member of FIG. It is explanatory drawing which shows the state with which the separation prevention plate was piled up on the engagement member of FIG. FIG. 5 is an enlarged cross-sectional view showing a state in which a mesh material fixing assembly in which an engaging member, a separation preventing plate and a connecting member are integrated is connected to an upper beam, which is a modified example of the guard fence of the present invention It is the VII-VII sectional view taken on the line of FIG. FIG. 8 is an arrow B view of the mesh member fixing assembly of FIG. 7.

  Next, an embodiment of the guard fence of the present invention will be described in more detail with reference to the drawings.

  The protective fence 1 shown in FIGS. 1 to 3 prevents an object from jumping out from a specific area, and is installed along a side edge of a road such as a highway, for example. Prevent cargo from falling off the road. Specifically, the protective fence 1 includes a wire mesh 2, a holding frame 3 that holds the wire mesh 2, and a plurality of columns 4 that support the holding frame 3 in an upright state. The struts 4 are arranged along the side edges of the road at intervals, and are fixed to the concrete pedestals 5 extending along the side edges of the road using anchor bolts 8. For example, as shown in FIG. 3, the anchor bolt 8 has two male screw portions 8 a and a U-shaped connecting portion for connecting them, and the upper portion of each male screw portion 8 a is the base 5. The other part is exposed to the outside from the upper surface and is embedded in the base 5. A base plate 4c provided on the lower portion 4a of the support column 4 is fastened to the male screw portion 8a using a nut.

  As shown in FIGS. 1 and 2, the wire mesh 2 used in the present embodiment includes a main body portion 6 in which a plurality of thin steel wires (row lines) cross each other and is knitted in a net shape, and a net-like main body portion 6. It has a tension wire 7 made of a thick steel wire that supports the outer periphery, and has a horizontally long rectangular shape as a whole. The tension wire 7 constitutes an edge portion of the wire mesh 2. The tension wire 7 is disposed so as to extend along the upper end portion, the lower end portion, and the end portions of both side surfaces of the main body portion 6 of the wire mesh 2. In the present embodiment, the wire net having the tension wire 7 on the outer peripheral portion of the main body portion 6 has been described as an example of the net material, but the present invention is not limited to this, and various shapes and For example, a net material made of synthetic fibers having high tensile strength may be used as the net material.

  As shown in FIGS. 1 to 5, the holding frame 3 that holds the wire mesh includes a frame body 10, a plurality of engagement members 14 that are connected to the frame body 10 and engage with the wire 7 of the wire mesh 2, A separation prevention plate 15 disposed corresponding to the engagement member 14 and a bolt 16 for fastening each separation prevention plate 15 to the engagement member 14 are provided.

  As shown in FIGS. 1 and 3, the frame 10 has a rectangular shape so as to surround the wire mesh 2. The frame 10 is composed of a plurality of bars that surround the wire mesh 2, and specifically, an upper beam 11 and a lower beam 12 that are spaced apart from each other in the vertical direction and extend in the horizontal direction, and an upper beam 11 and a beam that extend in the vertical direction. It has the edge part connection member 13 which connects the edge parts of the lower beam 12. FIG. The upper beam 11, the lower beam 12, and the end connecting member 13 are made of a steel pipe having a circular cross section. The end connecting member 13 is connected to the respective ends of the upper beam 11 and the lower beam 12 via brackets or the like so as to be orthogonal to the upper beam 11 and the lower beam 12. The upper beam 11 and the lower beam 12 are fixed to the upper end portion 4b and the lower end portion 4a of the support column 4 by U-bolts 31 or the like while extending in the lateral direction.

  As shown in FIGS. 1 to 3, the plurality of engaging members 14 are connected to at least the upper portion of the frame body 10, arranged at substantially equal intervals along the inner peripheral edge of the frame body 10, and the edge portion of the wire mesh 2. It is a member engaged with the tension wire 7 which comprises. Specifically, as shown in FIGS. 4 to 5, the engaging member 14 protrudes from the surface of the main body 21 having the through hole 23 and engages with the wire 7 of the wire mesh 2. It has an engaging claw 22. The through hole 23 is located in the direction A that opens when the engagement claw 22 receives a load from the tension wire 7 of the wire mesh 2 with respect to the engagement claw 22. For example, when the engaging member 14 is disposed on the lower surface side of the upper beam 11 of the frame body 10 as shown in FIGS. 4 to 5, the through hole 23 is positioned below the engaging claw 22.

  The engaging member 14 is formed integrally with the flat plate-like main body 21 having the through hole 23 and the engaging claw 22 by raising the engaging claw 22 from the flat plate material at the place where the through hole 23 is formed. Manufactured as follows.

  The size of the through hole 23 may be any size as long as the bolt 16 can be inserted, but preferably, when the engaging claw 22 receives a load in the direction A shown in FIG. When the bolt 16 suppresses the opening of the engaging claw 22 inside the through hole 23, the bolt 16 is preferably set to have a size that minimizes the movement inside the through hole 23.

  In this embodiment, the engaging member 14 is attached to each of the upper beam 11, the lower beam 12, and the end connecting member 13, but the present invention is not limited to this. Considering that there is a high possibility that a downward load is applied due to a person hanging on the wire mesh 2, it is only necessary to be attached at least to the lower side of the upper beam 11.

  As shown in FIGS. 2 to 4 and 6, the detachment prevention plate 15 is formed of a rectangular flat plate and has a rectangular insertion hole 26 having a size into which the engagement claw 22 and the bolt 16 can be inserted. The separation preventing plate 15 is disposed on the opposite side of the engagement member 14 from the main body 21 with the wire mesh 2 interposed therebetween, and is fastened to the main body 21 by bolts 16. The separation preventing plate 15 covers a portion of the engagement claw 22 that contacts the tension wire 7 of the wire mesh 2, and the movement of the tension wire 7 of the wire mesh 2 in the direction C (see FIG. 4) toward the tip of the engagement claw 22. By restricting, the tension wire 7 of the wire mesh 2 is prevented from being detached from the engaging member 14. In this embodiment, the separation preventing plate 15 is described as an example of the separation preventing member 15 for preventing the tension wire 7 of the wire mesh 2 from separating from the engaging member 14. You may employ | adopt the removal prevention member of forms other than a shape.

  The bolt 16 has a head portion 16a and a male screw portion 16b. The bolt 16 fastens the detachment prevention plate 15 to the main body portion 21 of the engaging member 14 with the wire mesh 2 interposed between the main body portion 21 and the detachment prevention plate 15. Specifically, the male threaded portion 16 b of the bolt 16 can be screwed into the nut 17 while passing through the insertion hole 26 of the separation preventing plate 15 and the through hole 23 of the main body portion 21. Thereby, the main-body part 21 and the removal prevention plate 15 are pinched | interposed from the outer side by the head 16a and the nut 17 of the volt | bolt 16 in the state which the metal-mesh 2 interposes. As a result, the bolt 16 restrains the engaging claw 22 from the opposite side of the tension wire 7 of the wire mesh 2 (that is, the lower side in FIG. 4) and suppresses the opening of the engaging claw 22. It is fixed to the main body 21 in a state where it is inserted into the main body 21.

  Said guard fence 1 is manufactured in the following procedures.

  First, the engaging member 14 is formed. Specifically, the engaging claw 22 is cut and raised from a flat plate material at the place where the through hole 23 is formed, so that the main body 21 having the through hole 23 positioned in the opening direction A of the engaging claw 22 and the engaging claw 22 is formed.

  Next, the engaging member 14 is attached to the frame 10 of the holding frame 3. Specifically, the engaging member 14 is connected to each of the upper beam 11, the lower beam 12, and the end connecting member 13 constituting the frame 10 by welding or the like, and thereafter, the upper beam 11, the lower beam 12, and The frame 10 is assembled by connecting the end connecting members 13. Here, the end 14a of the engaging member 14 (the end located in the direction opposite to the direction A with respect to the engaging claw 22) is the upper beam 11, the lower beam 12, and the end connecting member constituting the frame body 10. It connects with the part which comprises the inner peripheral side of each of the 13 frame bodies 10 by welding. For example, as shown in FIGS. 4 to 5, the upper end portion 14 a of the engaging member 14 is connected to the lower surface side of the upper beam 11 by welding or the like.

  When assembling the frame 10 of the holding frame 3, the upper beam 11 and the lower beam 12 are fixed beforehand to the upper part 4 b and the lower part 4 a of the support column 4 with U-bolts 31, and the upper and lower ends of the end connecting member 13 are What is necessary is just to connect with the upper beam 11 and the lower beam 12, respectively. As a result, the holding frame 3 is supported by the support column 4.

  Next, the wire mesh 2 is spread inside the frame body 10 of the holding frame 3, and the tension wire 7 of the wire mesh 2 is engaged with the engagement claws 22 of the respective engagement members 14. At this time, if the wire 7 of the wire mesh 2 is first engaged with the engaging claw 22 of the engaging member 14 connected to the upper beam 11, the wire mesh 2 is suspended from the upper beam 11 and is stably placed temporarily. It becomes the state of. Therefore, the operator does not have to hold the wire mesh 2 on the upper portion of the frame body 10 by hand, and both hands can be used freely. Therefore, the wire mesh 2 with respect to the engagement claw 22 of the engagement member 14 in other places. The work of engaging the tension wire 7 becomes easy.

  Thereafter, the separation prevention plate 15 is attached to each engagement member 14. Specifically, first, the metal mesh 2 is sandwiched between the separation prevention plate 15 and the main body 21 by disposing the separation prevention plate 15 on the opposite side of the main body 21 of each engaging member 14 with the metal mesh 2 interposed therebetween. In this state, the bolt 16 is inserted into the insertion hole 26 of the separation preventing plate 15 and the through hole 23 of the main body portion 21 into the bolt 16, and the nut 17 is screwed into the male thread portion 16 b of the bolt 16. Thereby, the separation preventing plate 15 is fastened to the main body portion 21 with the bolt 16. After the bolt fastening, the wire mesh 2 is held in a state of being sandwiched between the separation preventing plate 15 and the main body portion 21.

(Feature)
(1)
In the protective fence 1 of the above embodiment, when attaching the wire mesh 2 to the holding frame 3, first, the engaging claw 22 of the engaging member 14 attached to the upper portion of the frame body 10 of the holding frame 3 with the tension wire 7 of the wire mesh 2. By engaging with the wire mesh 2, the wire mesh 2 is kept in a temporarily placed state suspended from the upper portion of the frame body 10. In this state, the operator does not need to hold the wire mesh 2 on the upper part of the frame body 10 by hand, and both hands can be used freely, so that the subsequent work can be easily performed and the workability is improved. Specifically, after the wire mesh 2 is temporarily placed, the operator uses both hands to engage the wire 7 of the wire mesh 2 with the engaging claws 22 at a portion other than the upper portion of the frame body 10. After the work of engaging the wire 7 of the wire mesh 2 with the engagement claw 22 is completed, the operator makes the separation prevention plate 15 face the main body 21 of the engagement member 14 and engages the wire mesh 2 with the engagement. The body 14 is sandwiched and held between the main body 21 of the member 14 and the detachment prevention plate 15, and the detachment prevention plate 15 is held by the bolt 16 with the metal mesh 2 interposed between the main body 21. Fasten to 21. Since the operator does not have to hold the wire mesh 2 with his / her hand to position the detachment prevention plate 15 as described above, he / she can work with both hands. As described above, since the wire mesh 2 can be easily attached to the holding frame 3, the workability is improved as compared with the conventional protective fence.

  Further, in a state where the wire mesh 2 is attached to the holding frame 3, the separation preventing plate 15 covers a portion of the engagement claw 22 that contacts the wire 7 of the wire mesh 2, so that the wire 7 of the wire mesh 2 is engaged with the engagement claw. The movement in the direction C (refer to FIG. 4) toward the tip of the wire 22 is restricted, and the tension wire 7 of the wire mesh 2 can be prevented from being detached from the engagement member 14. Therefore, the tension wire 7 of the wire mesh 2 is engaged with the engagement claw 22 and is prevented from being detached from the engagement member 14 by the separation prevention plate 15 fastened to the engagement member 14 with a bolt. Therefore, it is possible to reduce the possibility that the wire mesh 2 is detached from the holding frame 3 by both the engaging claw 22 and the separation preventing plate 15.

(2)
In the protective fence 1 of the above embodiment, the through-hole 23 formed in the main body 21 of the engagement member 14 receives a load from the tension wire 7 of the wire mesh 2 with respect to the engagement claw 22. It is located in the direction A that sometimes opens. The bolt 16 is fixed to the main body 21 while being inserted into the through hole 23 at a position where the engagement claw 22 is restrained from the opposite side of the wire 7 of the wire mesh 2 to prevent the engagement claw 22 from opening. ing. With this configuration, the bolt 16 can not only fasten the separation preventing plate 15 to the main body portion 21 of the engaging member 14 but also can suppress the opening of the engaging claw 22.

  Specifically, the bolt 16 is positioned in the opening direction A of the engaging claw 22 at a position where the engaging claw 22 is restrained from the opposite side of the tension wire 7 of the wire mesh 2 and the opening of the engaging claw 22 is suppressed. Since it is fixed to the main body 21 while being inserted into the through-hole 23, even when a load is applied to the wire mesh 2, the engaging claw 22 is restrained from the opposite side of the wire 7 to the wire mesh 2. It is possible to suppress the opening of the nail 22. As a result, it is possible to reduce the possibility that the wire mesh 2 is detached from the holding frame 3.

  Therefore, even if the rigidity of the engagement claw 22 itself is not high, the opening of the engagement claw 22 is suppressed by the bolt 16, so that the possibility that the wire mesh 2 is detached from the engagement claw 22 can be reduced. Therefore, it becomes possible to manufacture the engaging member 14 including the engaging claw 22 from an inexpensive thin steel plate while ensuring that the opening of the engaging claw 22 is suppressed.

(3)
In the protective fence 1 of the present embodiment, the detachment prevention plate 15 has an insertion hole 26 having a size that allows the engagement claw 22 to be inserted in addition to the bolt 16. In this configuration, when the separation preventing plate 15 is fastened to the main body portion 21 of the engaging member 14 with the bolt 16, the engaging claw 22 and the bolt 16 are inserted into the insertion hole 26 of the separation preventing plate 15, and in this state, The separation preventing plate 15 is fastened to the main body 21 with a bolt 16 in a state where the wire mesh 2 is interposed between the main body 21 of the engaging member 14. For this reason, the separation preventing plate 15 does not interfere with the engaging claws 22, and the interval between the separation preventing plate 15 and the main body 21 can be narrowed. It becomes possible to pinch strongly. Thereby, it becomes possible to hold | maintain the metal-mesh 2 more firmly with respect to the holding frame 3, and it is possible to reduce the wobbling and rattling of the metal-mesh 2.

(4)
Moreover, in the manufacturing method of the protection fence 1 of this embodiment, in the process of forming the engagement member 14, the engagement nail | claw 22 is formed by raising the engagement nail | claw 22 in the formation place of the through-hole 23 from a flat material. And an engagement member 14 having a through hole 23 located in the opening direction A of the engagement claw 22 is formed. Therefore, the engaging member 14 can be easily and inexpensively formed using a metal thin plate or the like. As a result, the protective fence 1 can be manufactured at low cost.

(Modification)
(A)
The protective fence 1 of the above embodiment has a structure in which the engaging member 14 and the separation preventing plate 15 are separated, but the present invention is not limited to this. As a modification of the present invention, as shown in FIGS. 7 to 9, the engaging member 54 and the detachment preventing plate 55 may be connected to each other. Specifically, the holding frame 3 shown in FIG. 7 includes a connecting member 53 that connects the engaging member 54 and the separation preventing plate 55.

  The connecting member 53, the engaging member 54, and the separation preventing plate 55 are integrally formed of a thin metal plate or the like, thereby constituting one wire mesh fixing assembly 51. Also in this configuration, the engaging claw 62 is formed by cutting and raising the opening location of the through hole 63 in the engaging member 54 as in the above embodiment.

  Specifically, the connecting member 53 includes a first end portion 53 a connected to the engaging member 54, a second end portion 53 b connected to the detachment preventing plate 55, and an upper portion that is a cross that constitutes the frame body 10. And an abutting portion 53c that abuts on the outer circumferential surface of the beam 11 (or the lower beam 12 or the end connecting member 13).

  As shown in FIG. 7, the contact portion 53 c is engaged with the outer peripheral surface of the upper beam 11 on the opposite side of the engagement claw 62 of the engagement member 54 in the crosspiece (such as the upper beam 11). The claw 62 has a shape capable of transmitting the load when the load in the direction A is received from the tension wire 7 constituting the edge portion of the wire mesh 2 to the upper beam 11. Specifically, the contact portion 53c shown in FIG. 7 has a shape having an opening 53d that is opened downward by removing a part of the lower surface side of the horizontally extending cylinder.

  The abutment portion 53c abuts the outer peripheral surface of the upper beam 11 on the side opposite to the engagement claw 62 in the crosspiece (such as the upper beam 11), so that the engagement claw 62 extends from the tension wire 7 of the wire mesh 2 in the direction A. Since the load when the load is received can be transmitted to the upper beam 11, the load applied to the engaging claw 62 can be received by the entire upper beam 11 via 53.

  The inner peripheral surface 53 f of the contact portion 53 c has a shape that contacts the outer peripheral surface corresponding to the outer peripheral surface of the upper beam 11. A housing portion 53e that houses the upper beam 11 is formed by the inner peripheral surface 53f of the contact portion 53c. The inner peripheral surface 53f of the accommodating portion 53e is set so that the inner diameter of the accommodating portion 53e is the same as or slightly smaller than the outer diameter of the upper beam 11. Thereby, the contact part 53 c surrounds the outer periphery of the upper beam 11, and the inner peripheral surface 53 f is fitted to the outer peripheral surface of the upper beam 11. Thereby, the wire mesh fixing assembly 51 is fixed in a state of being wound around the outer periphery of the upper beam 11. Note that the opening width of the opening 53d is set to be smaller than the diameter of the upper beam 11.

  Note that the engagement member 54 and the separation preventing plate 55 shown in FIG. 7 are the same as the engagement member 14 and the separation prevention plate shown in FIGS. 15 has the same configuration. That is, the engaging member 54, like the engaging member 14 shown in FIGS. 4 to 5, is engaged with the main body portion 61 having the through hole 63 and the tension wire 7 of the wire mesh 2 protruding from the surface of the main body portion 61. And an engaging claw 62 for mating. The through-hole 63 is located in the direction A that opens when the engagement claw 62 receives a load from the tension wire 7 of the wire mesh 2 with respect to the engagement claw 62. Further, the separation preventing plate 55 is formed of a rectangular flat plate and has a rectangular insertion hole 66 having a size into which the engagement claw 62 and the bolt 16 can be inserted.

  As shown in FIG. 7, the wire mesh fixing assembly 51 (that is, the combination of the connecting member 53, the engaging member 54, and the separation preventing plate 55) configured as described above is attached to the upper beam 11 of the frame body 10. When attaching, the opening 53d of the contact part 53c in the connection member 53 is first spread by hand, and the upper beam 11 is inserted into the accommodating part 53e from the opening 53d. At this time, the contact portion 53c is contracted in the direction in which the opening 53d is narrowed by the restoring force of the contact portion 53c, so that the contact portion 53c is fitted to the upper beam 11 while being wrapped around the outer periphery of the upper beam 11. Is possible. Thereby, the wire mesh fixing assembly 51 can be attached to the upper beam 10 manually without welding. Further, it is possible to attach the wire mesh fixing assembly 51 to the lower beam 11 and the end connecting member 13 of the frame body 10 in the same procedure. In this way, the wire mesh fixing assembly 51 can be easily attached to a predetermined portion of the frame body 10.

  Therefore, since an operation such as welding is not required for attaching the engaging member 54 to the frame body 10, it is possible to easily attach the engaging member 54 to the already installed frame body 10.

  7-9, the connecting member 53, the engaging member 54, and the separation preventing plate 55 are integrally formed. Therefore, the connecting member 53, the engaging member 54, and the separation preventing plate 55 are integrally formed. Can be easily and inexpensively formed using a metal thin plate or the like.

  The connecting member 53, the engaging member 54, and the detachment preventing plate 55 may be connected to each other after being formed individually.

(B)
In the above embodiment, the engaging claw 22 of the engaging member 14 is engaged with the tension wire 7 made of a thick steel wire as the edge portion of the wire mesh 2, but the present invention is not limited to this. The engaging claw of this invention should just be engaging with the edge part of a net | network material. Therefore, for the mesh material that does not have a tension wire, the engagement claw may be engaged with the mesh of the edge portion of the mesh material.

(C)
In the above embodiment, the protective fence 1 is provided along a side edge of a road such as an expressway. However, the present invention is not limited to this, and an object jumps out from a specific area to the outside. In order to prevent this, a protective fence may be installed at a place other than the road. For example, the protective fence of the present invention may be installed on the outer periphery of a park or the like.

1 Guard fence 2 Wire mesh (net material)
3 Holding frame 7 Tension line (edge part)
10 Frames 14 and 54 Engaging members 15 and 55 Detachment prevention plate (detachment prevention member)
16 bolt 53 connecting member

Claims (7)

A protective fence that prevents objects from jumping out of a specific area.
A netting material that partitions the inside and outside of the region;
A holding frame that is erected near the boundary of the region and holds the mesh material;
With
The holding frame is
A frame surrounding the periphery of the mesh material;
A plurality of engaging members connected to at least an upper portion of the frame body and engaged with an edge portion of the net member, the main body portion, and a member protruding from the surface of the main body portion and engaging with the edge portion of the net member An engaging member having a pawl;
The edge portion of the mesh material is disposed on the opposite side of the main body portion with the mesh material interposed therebetween, and covers the portion of the engagement claw that contacts the edge portion of the mesh material. A disengagement prevention member for preventing disengagement;
In the state where the mesh material is interposed between the main body and the separation preventing member, the separation prevention member has a bolt for fastening to the main body.
A protective fence characterized by that. The body portion is formed with a through hole into which the bolt is inserted,
The through-hole is located in a direction that opens when the engaging claw receives a load from an edge portion of the mesh member with respect to the engaging claw,
The bolt is fixed to the main body in a state in which the engagement claw is restrained from the opposite side of the edge portion of the mesh material and the opening of the engagement claw is suppressed and inserted into the through hole. The protective fence according to claim 1. The separation preventing member has an insertion hole having a size into which the engagement claw and the bolt can be inserted.
The protective fence according to claim 1 or 2. The frame is composed of a plurality of bars that surround the mesh material,
The holding frame further includes a connecting member that connects the engaging member and the separation preventing member,
The connecting member is
A first end coupled to the engagement member;
A second end connected to the separation preventing member;
By contacting the outer peripheral surface of the crosspiece on the opposite side of the engagement claw in the crosspiece, the load when the engagement claw receives a load from the edge portion of the mesh material can be transmitted to the crosspiece. A contact portion having a possible shape,
The guard fence in any one of Claim 1 to 3. The contact portion has an inner peripheral surface having a shape corresponding to the outer peripheral surface of the crosspiece,
The contact portion surrounds the outer periphery of the crosspiece, and the inner peripheral surface is fitted to the outer peripheral surface of the crosspiece.
The protective fence according to claim 4.   The protective fence according to claim 4 or 5, wherein the connecting member, the engaging member, and the separation preventing member are integrally formed. A method for manufacturing a protective fence according to claim 2,
The engagement member having the through-hole and the engagement claw located in the opening direction of the engagement claw by cutting and raising the engagement claw from a flat material at the formation position of the through-hole. Forming a joint member;
Attaching the engagement member to the frame;
Engaging an edge portion of the mesh material with the engaging claw;
And a step of inserting the bolt into the through hole and fastening the detachment preventing member to the main body with the bolt.